Flowmaster American Thunder SS Crossmbr-Back For C10 63-66 V8 (817937-12K)

The Flowmaster American Thunder SS Crossmember-Back Exhaust System is a high-performance exhaust upgrade designed for classic 1963-1966 Chevrolet C10 and GMC 1000 series 2-wheel drive trucks. Constructed with 2.50-inch mandrel bent 409 stainless steel tubing and featuring a built-in H-pipe crossover, this system enhances exhaust flow for improved performance and durability. Equipped with Super 44 Series performance mufflers, it delivers a deep, aggressive tone that balances exterior and interior sound levels. The system is engineered for easy installation with all necessary hardware included, making it suitable for at-home setup. Its stainless steel construction ensures long-lasting corrosion resistance, and the design maximizes exhaust pulse flow for better horsepower and torque.

This exhaust system fits 1963-1966 Chevrolet C10 and GMC 1000 series trucks with V8 engines, specifically those without the X-Frame and torsion bar front suspension. It is compatible with both short and long wheelbase models and can be installed as a direct replacement or upgrade starting just after the factory manifold downpipes or headers. The system offers three tailpipe exit options: straight out the rear, side exit behind each rear tire, or dumped behind the rear tires, catering to different aesthetic and sound preferences. Suitable for street use and daily driving, this system provides a balance of performance, durability, and classic Flowmaster tone, backed by a lifetime limited warranty.