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Manufacturer information. Check the part number and installation requirements for your vehicle.
Supplier details checked 2026-09-23 · Test catalog
Fits 1967-1972 Chevrolet/GMC C10, C15 1/2 ton trucks with V8 engines. Stainless Steel. - Aggressive to moderate sound
Flowmaster American Thunder Crossmember-Back Exhaust System
Super 44 Series Mufflers for Deep Powerful Sound
Includes Hangers and Hardware for Installation
Mandrel-bent 16-gauge Stainless Steel Tubing
Aggressive to Moderate Exterior Exhaust Tone
Crossmember-Back True Dual Exhaust System
H-pipe Crossover for Maximum Power
Four Choices of Tailpipe Exits
Lifetime Limited Warranty
Does Not include exhaust tips, header reducer cones or downpipes for factory manifolds.
Flowmaster 67-72 GM C10/C15 American Thunder SS Crossmember-Back Exhaust System
6772 GM C10C15 XMEMBER BACK AMT 409S
SYS 67-72 GM C10/C15
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.
SYS 67-72 GM
