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Fits 1964 to 1967 Buick Gran Sport, Skylark, Special and 1 more model, and 3 more makes. See every vehicle
This American Thunder® Crossmember-Back exhaust system is a true dual 3.00-inch muscle car system that gives your car a deep aggressive sound. This aluminized steel system is mandrel-bent for maximum exhaust flow and performance. The system 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 are in a large case to handle the high horsepower and provide a deep muscular tone while 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 modification. 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 3 Year Limited Warranty.
Warranty: Manufacturer's Limited 3 Year Warranty
| Year | Make | Model | Submodel | Engine |
|---|---|---|---|---|
| 1965 - 1966 | Buick | Gran Sport | Base | 6.6L 401 V8 |
| 1967 | Buick | Gran Sport | Base | 5.6L 340 V8, 6.6L 400 V8 |
| 1964 | Buick | Skylark | Base | 4.9L 300 V8 |
| 1965 | Buick | Skylark | Base | 4.9L 300 V8, 6.6L 401 V8 |
| 1966 | Buick | Skylark | Base | 4.9L 300 V8, 5.6L 340 V8, 6.6L 401 V8 |
| 1967 | Buick | Skylark | Base | 4.9L 300 V8, 5.6L 340 V8, 6.6L 400 V8 |
| 1964 - 1965 | Buick | Special | Base, Deluxe | 4.9L 300 V8 |
| 1966 - 1967 | Buick | Special | Base, Deluxe | 4.9L 300 V8, 5.6L 340 V8 |
| 1964 - 1965 | Buick | Sportwagon | Base | 4.9L 300 V8 |
| 1966 | Buick | Sportwagon | Base, Custom | 5.6L 340 V8 |
| 1967 | Buick | Sportwagon | Base | 5.6L 340 V8 |
| 1964 | Chevrolet | Chevelle | 300, Malibu, Malibu Super Sport | 4.6L 283 V8, 5.3L 327 V8 |
| 1965 | Chevrolet | Chevelle | 300, 300 Deluxe, Malibu, Malibu Super Sport | 4.6L 283 V8, 5.3L 327 V8, 6.5L 396 V8 |
| 1966 | Chevrolet | Chevelle | 300, 300 Deluxe, Malibu, Super Sport 396 | 4.6L 283 V8, 5.3L 327 V8, 6.5L 396 V8 |
| 1967 | Chevrolet | Chevelle | 300, 300 Deluxe, Concours, Malibu, SS 396 | 4.6L 283 V8, 5.3L 327 V8, 6.5L 396 V8 |
| 1964 - 1965 | Chevrolet | El Camino | Base | 4.6L 283 V8, 5.3L 327 V8 |
| 1966 - 1967 | Chevrolet | El Camino | Base | 4.6L 283 V8, 5.3L 327 V8, 6.5L 396 V8 |
| 1964 | Oldsmobile | 442 | Base | 5.4L 330 V8 |
| 1965 - 1967 | Oldsmobile | 442 | Base | 6.6L 400 V8 |
| 1964 | Oldsmobile | Cutlass | Base, Holiday | 5.4L 330 V8 |
| 1965 - 1966 | Oldsmobile | Cutlass | Base, Holiday | 5.4L 330 V8, 6.6L 400 V8 |
| 1967 | Oldsmobile | Cutlass | Base, Holiday, Turnpike Cruiser | 5.4L 330 V8, 6.6L 400 V8 |
| 1967 | Oldsmobile | Cutlass Supreme | Base | 5.4L 330 V8 |
| 1964 | Oldsmobile | F85 | Base, Deluxe | 5.4L 330 V8 |
| 1965 | Oldsmobile | F85 | Base, Deluxe | 5.4L 330 V8, 6.6L 400 V8 |
| 1966 | Oldsmobile | F85 | Base, Deluxe, Holiday | 5.4L 330 V8, 6.6L 400 V8 |
| 1967 | Oldsmobile | F85 | Base | 5.4L 330 V8 |
| 1964 - 1967 | Oldsmobile | Vista Cruiser | Base, Custom | 5.4L 330 V8 |
| 1964 | Pontiac | Beaumont | Base | 4.6L 283 V8, 5.3L 327 V8 |
| 1965 - 1967 | Pontiac | Beaumont | Base | 4.6L 283 V8, 5.3L 327 V8, 6.5L 396 V8 |
| 1964 - 1966 | Pontiac | GTO | Base | 6.4L 389 V8 |
| 1967 | Pontiac | GTO | Base | 6.6L 400 V8 |
| 1964 - 1967 | Pontiac | LeMans | Base | 5.3L 326 V8 |
| 1964 - 1965 | Pontiac | Tempest | Base, Custom, Safari | 5.3L 326 V8 |
| 1966 | Pontiac | Tempest | Base, Safari | 5.3L 326 V8 |
| 1967 | Pontiac | Tempest | Base, Custom, Safari | 5.3L 326 V8 |