
817937 American Thunder Header-Back Exhaust System 1963-1966 GM C10/1000 Series Pickup Truck 2WD V8, Short and Long Bed
Flowmaster 817937
Features:
- Aggressive to moderate exterior and interior sound level
- 409 stainless steel mandrel-bent tubing with built-in H-pipe crossover pipe
- (3) different tailpipe exhaust exit options for a customized appearance - straight, side exit behind each rear tire, or dumped behind the rear tires
- Muffler dimensions: Body length: 13.250 in., Overall length: 19.500 in.
Notes:
- Exhaust tips NOT included
- Does NOT fit trucks with torsion bar front suspension or X-frames
Emissions: This part is legal for sale and uses on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.
The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
The following vehicles are considered Racing Use Only Vehicles:
- Vehicles that are used exclusively for competition and that are not registered and that may never be used on the street
The Classic Sound of Flowmaster
Flowmaster American Thunder Exhaust Systems for Truck/SUVs are ideal for the one looking for a moderate-to-aggressive exhaust tone, inside and out. The mufflers are tuned to deliver more power, torque, throttle response, and mileage. With easy fitment in mind, each system has mandrel-bent tubing for maximum performance and flow; and includes all necessary parts and hardware for installation.



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