Flowmaster SS American Thunder Thru Valance Exhaust For 64-73 Ford Mustang, Shelby GT350/GT500 (67-70) (817281)

The Flowmaster American Thunder THRU VALANCE SS Crossmember-Back Exhaust System is a high-performance dual exhaust upgrade designed for classic Ford Mustangs from 1967 to 1970. Constructed from 16-gauge mandrel-bent stainless steel tubing, it features a built-in H-pipe crossover and a pair of Super 44 Series mufflers to deliver a moderate to aggressive exhaust tone. This system enhances throttle response, power, and fuel efficiency while providing a durable, corrosion-resistant stainless steel build. It is engineered for an easy installation, fitting through the factory rear valance cutouts and including all necessary hangers and hardware. The system also includes polished 3.00-inch stainless steel tips for a refined appearance.

Designed specifically for 1967-1970 Ford Mustang models, this exhaust system is compatible with vehicles equipped with standard configurations and is intended for street use. It does not fit convertibles or cars with staggered shocks, and it does not include header reducer cones or downpipes for factory manifolds. The system is a direct bolt-on replacement that offers an aggressive sound profile, making it ideal for enthusiasts seeking a performance upgrade with a bold exhaust note. Perfect for street-driven muscle cars, it provides a straightforward upgrade to improve overall vehicle performance and sound.