The Flowmaster American Thunder Crossmember-Back Exhaust System is a high-performance dual exhaust setup designed for classic 1967-1972 Chevrolet and GMC 4WD trucks with V8 engines. Constructed with mandrel-bent 2.50-inch stainless steel tubing, it features a built-in H-pipe crossover to enhance exhaust scavenging and improve flow. Equipped with Super 44 Series performance mufflers, this system delivers an aggressive to moderate sound level both inside and outside the vehicle. It is a complete bolt-on upgrade that offers improved exhaust performance, durability, and a distinctive sound profile, making it suitable for enthusiasts seeking a balance of power and tone.
This exhaust system is specifically engineered for 1967-1972 Chevrolet and GMC K10, K15/K1500, K20, and K25/K2500 4WD trucks with V8 engines. It fits both short and long wheelbase models and is compatible with various tailpipe exit options, including behind the rear tires, side exit, or straight out the back under the bumper. Designed as a direct replacement, it includes all necessary hardware for installation and is covered by a lifetime limited warranty. Ideal for street use, daily driving, and performance upgrades, this system enhances both the sound and exhaust flow of your classic truck.
