Home / Shop / Flowmaster Stainless Steel American Thunder Exhaust Systems 817585 System, Thunder, Header-back, Steel, Natural, Rear Exit, Dodge, Plymouth, Kit

Flowmaster Stainless Steel American Thunder Exhaust Systems 817585 System, Thunder, Header-back, Steel, Natural, Rear Exit, Dodge, Plymouth, Kit

SKU: FLO817585

Exhaust Systems

Flowmaster

Flowmaster Stainless Steel American Thunder Exhaust Systems 817585 System, Thunder, Header-back, Steel, Natural, Rear Exit, Dodge, Plymouth, Kit

SKU: FLO817585

Exhaust Systems

LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.

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Description

Flowmaster Stainless Steel American Thunder exhaust systems have been designed with the latest exhaust technology available. Through this technology, you will experience improvements in acceleration, passing power, and fuel mileage. The key to these performance improvements is Flowmaster's use of mandrel-bent tubing. Their tubing allows for superior exhaust gas flow, while their stainless steel construction allows for their corrosion-resistant qualities. These American Thunder exhaust systems also feature a stainless steel muffler(s) that'll give you plenty of Flowmaster sound.

Part Type

Exhaust Systems

Data: v4.2 - Upd: 2026-10-17 03:10:42

Specifications

Product Attributes - Brand: Flowmaster
Product Attributes - Manufacturer's Part Number: 817585
Product Attributes - Part Type: Exhaust Systems
Product Attributes - Product Line: Flowmaster Stainless Steel American Thunder Exhaust Systems
Product Attributes - UPC: 700042027484
Product Attributes - System Material: 409 stainless steel
Product Attributes - System Style: Header-back
Product Attributes - Exhaust Type: Dual
Product Attributes - Exit Location: Rear
Product Attributes - System Finish: Natural
Product Attributes - Catalytic Converter(s) Included: No
Product Attributes - Intermediate Pipe Diameter (in.): 2.50 in.
Product Attributes - Muffler Included: Yes
Product Attributes - Muffler Quantity: Two
Product Attributes - Muffler Configuration: Single inlet/Single outlet
Product Attributes - Muffler Style: Chambered
Product Attributes - Muffler Material: 409 stainless steel
Product Attributes - Muffler Finish: Black
Product Attributes - Hardware Included: Yes
Product Attributes - Tailpipe Diameter (in.): 2.50 in.
Product Attributes - Tip Included: No
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Special Attention: It is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards.

Reference Information

Brand Name/s	Flowmaster
StreetFX SKU	flo817585
SFX Item ID	4983792
Supplier Item Code	4983792
Manufacturer SKU	817585
Manufacturer UPC	700042027484
Alternative References	FLM817585

Compatibility

Application Data

Make	PLYMOUTH
Model	VALIANT
Submodel	BROUGHAM
Beginning Year	1974
Ending Year	1971
Engine Type	V8
Liter	5.9
CID	360
Engine Size	5.9L/360
Engine Family	Mopar big block B
Body Style	Sedan
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
CC	4473
Engine VIN Code	J
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	BROUGHAM
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Liter	5.2
CID	318
Engine Size	5.2L/318
Engine Family	Mopar big block B
Body Style	Hardtop
Drivetrain	RWD
Application Notes	RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Transmission; Hemi Swap Gen III
Region	United States (USA)
CC	5211
Engine VIN Code	L
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	BROUGHAM
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Liter	5.2
CID	318
Engine Size	5.2L/318
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Transmission; Hemi Swap Gen III
Region	United States (USA)
CC	5211
Engine VIN Code	J
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	BROUGHAM
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Liter	5.9
CID	360
Engine Size	5.9L/360
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Transmission
Region	United States (USA)
CC	4473
Engine VIN Code	J
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	BROUGHAM
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Liter	5.9
CID	360
Engine Size	5.9L/360
Engine Family	Mopar small block LA
Body Style	Convertible
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
CC	5211
Engine VIN Code	J
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	BROUGHAM
Beginning Year	1970
Ending Year	1971
Engine Type	V8
Liter	5.2
CID	318
Engine Size	5.2L/318
Engine Family	Mopar small block LA
Body Style	Convertible
Drivetrain	RWD
Application Notes	RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; U/K
Region	United States (USA)
CC	5211
Transmission	Manual
Engine VIN Code	H

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1971
Engine Type	V8
Liter	5.6
CID	340
Engine Size	5.6L/340
Engine Family	Mopar small block LA
Body Style	Coupe
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
CC	5572
Transmission	Manual
Engine VIN Code	J

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1971
Engine Type	V8
Liter	5.6
CID	340
Engine Size	5.6L/340
Engine Family	Mopar small block LA
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Transmission
Region	United States (USA)
CC	5572
Transmission	Manual
Engine VIN Code	J

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.2
CID	318
CC	5211
Engine Size	5.2L/318
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; U/K
Region	United States (USA)
Engine VIN Code	J
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.2
CID	318
CC	5211
Engine Size	5.2L/318
Engine Family	Mopar big block B
Body Style	Convertible
Drivetrain	RWD
Application Notes	RWD; Transmission
Region	United States (USA)
Engine VIN Code	J
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.9
CID	360
CC	5572
Engine Size	5.9L/360
Engine Family	Mopar big block B
Body Style	Convertible
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; 409S Stainless Steel, Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
Engine VIN Code	J
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.2
CID	318
CC	5211
Engine Size	5.2L/318
Engine Family	Mopar big block B
Body Style	Convertible
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
Engine VIN Code	J
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1969
Ending Year	1971
Engine Type	V8
Liter	5.2
CID	318
CC	5211
Engine Size	5.2L/318
Engine Family	Mopar big block B
Body Style	Convertible
Drivetrain	RWD
Application Notes	RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Transmission
Region	United States (USA)
Engine VIN Code	G
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1973
Ending Year	1967
Engine Type	V8
Liter	5.2
CID	318
CC	5211
Engine Size	5.2L/318
Engine Family	Mopar big block B
Body Style	Convertible
Drivetrain	RWD
Application Notes	RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; U/K
Region	United States (USA)
Engine VIN Code	L
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1973
Ending Year	1967
Engine Type	V8
Liter	4.5
CID	273
CC	4473
Engine Size	4.5L/273
Engine Family	Mopar big block B
Body Style	Convertible
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
Engine VIN Code	G
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.9
CID	360
CC	4473
Engine Size	5.9L/360
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Transmission
Region	United States (USA)
Engine VIN Code	L
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.9
CID	360
CC	4473
Engine Size	5.9L/360
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Transmission
Region	United States (USA)
Engine VIN Code	L
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.9
CID	360
CC	5211
Engine Size	5.9L/360
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
Engine VIN Code	L
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SIGNET
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.9
CID	360
CC	5211
Engine Size	5.9L/360
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Transmission
Region	United States (USA)
Engine VIN Code	L
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SWINGER
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	5.9
CID	360
CC	4473
Engine Size	5.9L/360
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
Engine VIN Code	K
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SWINGER
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	4.5
CID	273
CC	4473
Engine Size	4.5L/273
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
Engine VIN Code	G
Transmission	Manual

Make	PLYMOUTH
Model	VALIANT
Submodel	SWINGER
Beginning Year	1974
Ending Year	1967
Engine Type	V8
Liter	4.5
CID	273
CC	4473
Engine Size	4.5L/273
Engine Family	Mopar big block B
Body Style	Coupe
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
Engine VIN Code	L
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	SWINGER
Beginning Year	1974
Ending Year	1974
Engine Type	V8
Liter	5.9
CID	360
CC	4473
Engine Size	5.9L/360
Engine Family	Mopar small block LA
Body Style	Coupe
Drivetrain	RWD
Application Notes	American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing From Trans X-Member Back/H-Pipe/Hardware/80 Series(TM) Crossflow Muffler;Legal On Non-Emissions Controlled Vehicles Or For Race Use
Region	United States (USA)
Engine VIN Code	L
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	BROUGHAM
Beginning Year	1974
Ending Year	1974
Engine Type	V8
Liter	5.2
CID	318
CC	5211
Engine Size	5.2L/318
Engine Family	Mopar small block LA
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Transmission; Hemi Swap Gen III
Region	United States (USA)
Engine VIN Code	L
Transmission	Automatic

Make	PLYMOUTH
Model	VALIANT
Submodel	BROUGHAM
Beginning Year	1974
Ending Year	1974
Engine Type	V8
Liter	5.9
CID	360
CC	5211
Engine Size	5.9L/360
Engine Family	Mopar small block LA
Body Style	Coupe
Drivetrain	RWD
Application Notes	RWD; Transmission; Hemi Swap Gen III
Region	United States (USA)
Engine VIN Code	L
Transmission	Automatic

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Flowmaster Stainless Steel American Thunder Exhaust Systems 817585 System, Thunder, Header-back, Steel, Natural, Rear Exit, Dodge, Plymouth, Kit

Flowmaster Stainless Steel American Thunder Exhaust Systems 817585 System, Thunder, Header-back, Steel, Natural, Rear Exit, Dodge, Plymouth, Kit

Description

Part Type

Specifications

Reference Information

Compatibility

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