The American Thunder® Crossmember-Back exhaust system is a true dual large 3.00-inch muscle car system for the person who is looking for a deep aggressive sound for their high horsepower vehicle. This stainless steel system is mandrel-bent for maximum performance, includes an H-pipe crossover to balance out the exhaust pressures, add hp and torque, and to help eliminate back-rap on deceleration. The specially selected Super 40® Series performance mufflers feature a large case to handle the added horsepower and provide a deep muscular tone flowing through the large 3.00-inch tailpipes. The American Thunder systems generally deliver an aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modifications. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Covered by our Lifetime Limited Warranty.

This Part Fits:

Year	Make	Model	Submodel
1965-1967	Buick	Gran Sport	Base
1964-1967	Buick	Skylark	Base
1964-1967	Buick	Special	Base
1964-1967	Buick	Special	Deluxe
1964-1967	Buick	Sportwagon	Base
1966	Buick	Sportwagon	Custom
1964-1967	Chevrolet	Chevelle	300
1965-1967	Chevrolet	Chevelle	300 Deluxe
1967	Chevrolet	Chevelle	Concours
1964-1967	Chevrolet	Chevelle	Malibu
1964-1965	Chevrolet	Chevelle	Malibu Super Sport
1967	Chevrolet	Chevelle	SS 396
1966	Chevrolet	Chevelle	Super Sport 396
1964-1967	Chevrolet	El Camino	Base
1964-1967	Oldsmobile	442	Base
1964-1967	Oldsmobile	Cutlass	Base
1964-1967	Oldsmobile	Cutlass	Holiday
1967	Oldsmobile	Cutlass	Turnpike Cruiser
1967	Oldsmobile	Cutlass Supreme	Base
1964-1967	Oldsmobile	F85	Base
1964-1966	Oldsmobile	F85	Deluxe
1966	Oldsmobile	F85	Holiday
1964-1967	Oldsmobile	Vista Cruiser	Base
1964-1967	Oldsmobile	Vista Cruiser	Custom
1964-1967	Pontiac	GTO	Base
1964-1967	Pontiac	LeMans	Base
1964-1967	Pontiac	Tempest	Base
1964-1965,1967	Pontiac	Tempest	Custom
1964-1967	Pontiac	Tempest	Safari