Home / Shop / Flowmaster American Thunder Exhaust Systems for 1964-1972 EL CAMINO, 1971-1972 SPRINT - 17120 System, Thunder, Dual, Header-Back, Split Side Exits, 2.5 in. Dia., w/H-Pipe and Mufflers, Steel, Aluminized, Chevy, GMC, Kit

Flowmaster American Thunder Exhaust Systems for 1964-1972 EL CAMINO, 1971-1972 SPRINT - 17120 System, Thunder, Dual, Header-Back, Split Side Exits, 2.5 in. Dia., w/H-Pipe and Mufflers, Steel, Aluminized, Chevy, GMC, Kit

SKU: FLO17120

Exhaust Systems

Flowmaster

Flowmaster American Thunder Exhaust Systems for 1964-1972 EL CAMINO, 1971-1972 SPRINT - 17120 System, Thunder, Dual, Header-Back, Split Side Exits, 2.5 in. Dia., w/H-Pipe and Mufflers, Steel, Aluminized, Chevy, GMC, Kit

SKU: FLO17120

Exhaust Systems

LAST ONE! Est Ship 4-7 days. LAST ONE! This is the last unit at our distribution centre. Contact us if you need more. 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

A/T Exhaust System - 64-72 El Camino

Data: v4.2 - Upd: 2026-10-16 04:09:19

Specifications

Product Attributes - Brand: Flowmaster
Product Attributes - Manufacturer's Part Number: 17120
Product Attributes - Part Type: Exhaust Systems
Product Attributes - Product Line: Flowmaster Stainless Steel American Thunder Exhaust Systems
Product Attributes - UPC: 700042016808
Product Attributes - System Material: Steel
Product Attributes - System Style: Header-back
Product Attributes - Exhaust Type: Dual
Product Attributes - Exit Location: Split side
Product Attributes - System Finish: Aluminized
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: Steel
Product Attributes - Muffler Finish: Black
Product Attributes - Hardware Included: Yes
Product Attributes - Tailpipe Diameter (in.): 2.50 in.
Product Attributes - Tip Included: Yes
Product Attributes - Tip Outlet Size (in.): 2.50
Product Attributes - Tip Quantity: 2
Product Attributes - Tip Shape: Round
Product Attributes - Tip Cut: Straight
Product Attributes - Tip Edge Style: Non-rolled edge, single-wall
Product Attributes - Tip Material: 304 stainless steel
Product Attributes - Tip Color: Polished
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Notes: Includes H-pipe.
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	flo17120
SFX Item ID	4983705
Supplier Item Code	4983705
Manufacturer SKU	17120
Manufacturer UPC	700042016808
Alternative References	FLM17120

Compatibility

Application Data

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1970
Engine Type	L6
Liter	4.1
CID	250
CC	7441
Engine Size	4.1L/250
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD
Region	United States (USA)
Engine VIN Code	F

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1970
Engine Type	L6
Liter	5.0
CID	307
CC	7441
Engine Size	5.0L/307
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; LT Swap, Moderate to Aggressive Exterior Exhaust Tone
Region	United States (USA)
Engine VIN Code	F

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1970
Engine Type	L6
Liter	5.0
CID	307
CC	4098
Engine Size	5.0L/307
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Moderate to Aggressive Exterior Exhaust Tone, Small Block Chevy Swap
Region	United States (USA)
Engine VIN Code	W

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1972
Engine Type	L6
Liter	5.0
CID	402
CC	7441
Engine Size	6.6L/402
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Moderate to Aggressive Exterior Exhaust Tone; Moderate to Aggressive Exterior Exhaust Tone
Region	United States (USA)
Engine VIN Code	S

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1968
Engine Type	L6
Liter	5.0
CID	400
CC	7441
Engine Size	6.6L/400
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; LS Swap, Moderate to Aggressive Exterior Exhaust Tone
Region	United States (USA)
Engine VIN Code	R

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1969
Engine Type	L6
Liter	6.6
CID	402
CC	6588
Engine Size	6.6L/402
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LS Swap
Region	United States (USA)
Engine VIN Code	S

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1970
Ending Year	1969
Engine Type	L6
Liter	6.6
CID	402
CC	7441
Engine Size	6.6L/402
Engine Family	Chevy big block Mark IV
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Moderate to Aggressive Exterior Exhaust Tone
Region	United States (USA)
Engine VIN Code	W

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1970
Ending Year	1972
Engine Type	L6
Liter	6.6
CID	402
CC	7439
Engine Size	6.6L/402
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD
Region	United States (USA)
Engine VIN Code	W

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1968
Ending Year	1972
Engine Type	L6
Liter	7.4
CID	454
CC	7439
Engine Size	7.4L/454
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LT Swap
Region	United States (USA)
Engine VIN Code	V

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1968
Ending Year	1972
Engine Type	L6
Liter	7.4
CID	454
CC	7439
Engine Size	7.4L/454
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LT Swap
Region	United States (USA)
Engine VIN Code	L

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1969
Ending Year	1969
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Small Block Chevy Swap
Region	United States (USA)
Engine VIN Code	V

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1969
Ending Year	1972
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LS Swap
Region	United States (USA)
Engine VIN Code	J

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1972
Ending Year	1971
Engine Type	V8
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	Chevy big block Mark IV
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LT Swap
Region	United States (USA)
Engine VIN Code	D

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1972
Ending Year	1971
Engine Type	V8
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LS Swap
Region	United States (USA)
Engine VIN Code	D

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1972
Ending Year	1971
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD
Region	United States (USA)
Engine VIN Code	D

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1972
Ending Year	1971
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	Chevy big block Mark IV
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Moderate to Aggressive Exterior Exhaust Tone, Small Block Chevy Swap
Region	United States (USA)
Engine VIN Code	D

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1972
Ending Year	1971
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	Chevy big block Mark IV
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LS Swap
Region	United States (USA)
Engine VIN Code	D

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1972
Ending Year	1971
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	Chevy big block Mark IV
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD
Region	United States (USA)
Engine VIN Code	V

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1971
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Moderate to Aggressive Exterior Exhaust Tone; Moderate to Aggressive Exterior Exhaust Tone
Region	United States (USA)
Engine VIN Code	W

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1971
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Big Block Chevy Swap
Region	United States (USA)
Engine VIN Code	V

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1972
Engine Type	V8
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	Chevy big block Mark IV
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Moderate to Aggressive Exterior Exhaust Tone
Region	United States (USA)
Engine VIN Code	K

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1972
Engine Type	V8
Liter	5.0
CID	400
CC	5031
Engine Size	6.6L/400
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LS Swap
Region	United States (USA)
Engine VIN Code	L

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1972
Engine Type	V8
Liter	5.7
CID	400
CC	4097
Engine Size	6.6L/400
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; LS Swap
Region	United States (USA)
Engine VIN Code	S

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1971
Ending Year	1972
Engine Type	V8
Liter	5.7
CID	350
CC	7439
Engine Size	5.7L/350
Engine Family	Chevy big block Mark IV
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Automatic
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD; Flowmaster American Thunder Crossmember-Back Exhaust System; Moderate to Aggressive Exterior Exhaust Tone; Moderate to Aggressive Exterior Exhaust Tone
Region	United States (USA)
Engine VIN Code	R

Make	GMC
Model	SPRINT
Submodel	SS
Beginning Year	1969
Ending Year	1969
Engine Type	L6
Liter	7.4
CID	454
CC	7441
Engine Size	7.4L/454
Engine Family	GM inline 6-cylinder
Body Style	Standard Cab Pickup
Truck Bed Length in. (AAIA)	79.3in, 201.4cm
Transmission	Manual
Drivetrain	RWD
Application Notes	79.3in, 201.4cm; Standard Cab Pickup; RWD
Region	United States (USA)
Engine VIN Code	F

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Flowmaster American Thunder Exhaust Systems for 1964-1972 EL CAMINO, 1971-1972 SPRINT - 17120 System, Thunder, Dual, Header-Back, Split Side Exits, 2.5 in. Dia., w/H-Pipe and Mufflers, Steel, Aluminized, Chevy, GMC, Kit

Flowmaster American Thunder Exhaust Systems for 1964-1972 EL CAMINO, 1971-1972 SPRINT - 17120 System, Thunder, Dual, Header-Back, Split Side Exits, 2.5 in. Dia., w/H-Pipe and Mufflers, Steel, Aluminized, Chevy, GMC, Kit

Description

Part Type

Specifications

Reference Information

Compatibility

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