Home / Shop / Flowmaster 50 Series Big Block Steel 3 Inch Muffler 530504 Muffler, Series, Dual in. Inlet/Dual 2 1/2 in. Outlet, Steel, Black, Each

Flowmaster 50 Series Big Block Steel 3 Inch Muffler 530504 Muffler, Series, Dual in. Inlet/Dual 2 1/2 in. Outlet, Steel, Black, Each

SKU: FLO530504

Mufflers

Flowmaster

Flowmaster 50 Series Big Block Steel 3 Inch Muffler 530504 Muffler, Series, Dual in. Inlet/Dual 2 1/2 in. Outlet, Steel, Black, Each

SKU: FLO530504

Mufflers

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

We accept

Description

Flowmaster 50 series Big Block mufflers have proven to not only significantly improve acceleration and towing power, but to simultaneously increase fuel economy as well. Because of their efficiency, underhood temperatures on trucks and motor homes can be reduced as much as 200 degrees F--helping to lengthen the service life of other engine components. These mufflers are designed and sized for larger gas and diesel engines typically used in towing vehicles and RVs. So, for more comfortable cruising, Flowmaster tuned them for reduced exterior exhaust sound and lower levels of interior resonance.

Part Type

50 Series Big Block Muffler

Data: v4.2 - Upd: 2026-10-15 02:36:42

Specifications

Product Attributes - Brand: Flowmaster
Product Attributes - Manufacturer's Part Number: 530504
Product Attributes - Part Type: Mufflers
Product Attributes - Product Line: Flowmaster 50 Series Big Block Mufflers
Product Attributes - UPC: 700042017560
Product Attributes - Muffler Material: Steel
Product Attributes - Inlet Diameter (in.): 3.00 in.
Product Attributes - Outlet Diameter (in.): 2.50 in.
Product Attributes - Inlet Quantity: 2
Product Attributes - Outlet Quantity: 2
Product Attributes - Electronic Valve: No
Product Attributes - Internal Construction: Chambered
Product Attributes - Inlet Location: Offset
Product Attributes - Outlet Location: Offset
Product Attributes - Case Shape: Oval
Product Attributes - Reversible: No
Product Attributes - Muffler Color: Black
Product Attributes - Case Exterior Length (in.): 22.00 in.
Product Attributes - Overall Length (in.): 28.00 in.
Product Attributes - Thickness (in.): 5.000
Product Attributes - Width (in.): 12.000 in.
Product Attributes - Outlet Style: Standard, without tip
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.

Reference Information

Brand Name/s	Flowmaster
StreetFX SKU	flo530504
SFX Item ID	4983833
Supplier Item Code	4983833
Manufacturer SKU	530504
Manufacturer UPC	700042017560
Alternative References	FLM530504

Compatibility

Application Data

Universal Yes

Make	CHEVROLET
Model	SILVERADO 1500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500
Submodel	SS
Beginning Year	2003
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	AWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	N
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500
Submodel	SS
Beginning Year	2003
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	AWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	N
Region	USA

Make	CHEVROLET
Model	SILVERADO 1500
Submodel	SS
Beginning Year	2003
Ending Year	2003
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	AWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	N
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	BASE
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LS
Beginning Year	2002
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 BI-FUEL
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	LT
Beginning Year	2002
Ending Year	2002
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2003
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2003
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2003
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2003
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 CNG
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	6.0
CID	364
CC	5967
Engine Family	CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Engine Size	6.0L/364
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	U
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	4WD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	4WD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	RWD
Application Notes	3.00 Inlet 2.50 Outlet ; 3.00 Inlet 2.50 Outlet , 3.00 Inlet 2.50 Outlet
Engine VIN Code	G
Region	USA

Make	CHEVROLET
Model	SILVERADO 2500 HD
Submodel	WT
Beginning Year	2004
Ending Year	2004
Engine Type	V8
Liter	8.1
CID	496
Engine Family	Chevy big block Gen VII
Engine Size	8.1L/496
Drivetrain	RWD
Application Notes	50 Series™ Big Block Muffler; 3.0 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel, Not Direct Fit-Some Adaptation Required
Engine VIN Code	G
Region	USA

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Flowmaster 50 Series Big Block Steel 3 Inch Muffler 530504 Muffler, Series, Dual in. Inlet/Dual 2 1/2 in. Outlet, Steel, Black, Each

Flowmaster 50 Series Big Block Steel 3 Inch Muffler 530504 Muffler, Series, Dual in. Inlet/Dual 2 1/2 in. Outlet, Steel, Black, Each

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