Exhaust› Exhaust Pipes, Systems and Components
Flowmaster
American Thunder Crossmember-Back Exhaust System Fits 1967-1972 Chevrolet/Gmc C10, C15 1/2 Ton Trucks With V8 Engines Stainless Steel Aggressive To Moderate Sound Flowmaster
SKU: F00L 817654
Moderate — 2–4 hours
Description
Part #: 817654
This American Thunder exhaust system is specifically designed for 1967-1972 Chevrolet and GMC C10 and C15 1/2 ton 2wd trucks with coil spring suspension. The system is perfect for the person looking for a moderate to aggressive interior and exterior sound level. Starting at the crossmember-back, the exhaust comes complete with a built-in H-pipe crossover, all mandrel-bent 2.50-inch stainless steel tubing, a pair of Super 44 Series performance mufflers, and your choice of four tailpipe exits. One set slightly angled down to clear larger rear bumpers, one set straight out the back under the rear bumper, out the sides behind the rear tires for that classic truck look or a dump style exiting behind the rear tires level with the body. The system includes all hardware necessary for installation and provides adequate clearance for substantially lowered vehicles. The exhaust system is covered by our Lifetime Limited Warranty. If you prefer Aluminized steel construction, check out system #17654 which comes with our 3-year Limited Warranty. Fits both short and long wheelbase trucks.
Features:
- Super 44 Series Mufflers for Deep Powerful Sound
- Includes Hangers and Hardware for Installation
- Crossmember-back True Dual Exhaust System
- Mandrel-bent 16-gauge Stainless Steel Tubing
- Aggressive to Moderate Exterior Exhaust Tone
- H-pipe Crossover for Maximum Power
- Four Choices of Tailpipe Exits
- Lifetime Limited Warranty
Exhaust System - American Thunder - Header-Back - 2-1/2 in Tailpipe - 2-1/2 in Tips - Stainless - Natural - GM Fullsize Truck 1967-72 - Kit
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Flowmaster |
| Part Number | F00L 817654 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy