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Flowmaster 817409 American Thunder Header Back Exhaust System Flowmaster 817409
$1,424.00
This American Thunder exhaust system comes as a complete true dual crossmember-back exhaust for your 1968-1972 GM A-body with a V8 engine. These dual exhaust systems feature 2.50-inch mandrel-bent stainless...
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This American Thunder exhaust system comes as a complete true dual crossmember-back exhaust for your 1968-1972 GM A-body with a V8 engine. These dual exhaust systems feature 2.50-inch mandrel-bent stainless steel tubing for maximum performance, includes a built-in H-pipe/balance tube flowing into a pair of large case Super 40 mufflers that deliver an aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The 2.50-inch tailpipes exit at a slight angle down under the rear bumper for a strong muscular look. The system includes all hangers and necessary hardware for installation. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage and is covered by our Lifetime Limited Warranty.
Specifications:
| Description_DES | American Thunder Header Back Exhaust System |
| Description_EXT | American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing/Super 40 Series™ Mufflers/H-Pipe/Hardware; 409 Stainless Steel; |
| Description_FAB | Mandrel Bent 16ga 409S Stainless Tubing |
| Description_FAB | Limited Lifetime Warranty |
| Description_FAB | Aggressive And Powerful Exterior Exhaust Tone |
| Description_FAB | Incl. Hangers and Hardware For Easy Installation |
| Description_FAB | Header Back System |
| Description_FAB | Dual Out Rear Exit |
| Description_FAB | Dyno Tuned for Maximum Performance |
| Description_FAB | Premium Flowmaster Quality |
| Description_MKT | This American Thunder exhaust system comes as a complete true dual crossmember-back exhaust for your 1968-1972 GM A-body with a V8 engine. These dual exhaust systems feature 2.50-inch mandrel-bent stainless steel tubing for maximum performance, includes a built-in H-pipe/balance tube flowing into a pair of large case Super 40 mufflers that deliver an aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The 2.50-inch tailpipes exit at a slight angle down under the rear bumper for a strong muscular look. The system includes all hangers and necessary hardware for installation. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage and is covered by our Lifetime Limited Warranty. |
| Description_SHO | Exhaust System Kit |
This Part Fits:
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1970 | Buick | GS | ||
| 1971 | Buick | GS | ||
| 1972 | Buick | GS | ||
| 1968 | Buick | GS 350 | ||
| 1969 | Buick | GS 350 | ||
| 1968 | Buick | GS 400 | ||
| 1969 | Buick | GS 400 | ||
| 1970 | Buick | GS 455 | ||
| 1971 | Buick | GS 455 | ||
| 1972 | Buick | GS 455 | ||
| 1969 | Buick | Skylark | ||
| 1970 | Buick | Skylark | ||
| 1968 | Buick | Special | ||
| 1969 | Buick | Special | ||
| 1968 | Chevrolet | Chevelle | SS | |
| 1969 | Chevrolet | Chevelle | SS | |
| 1970 | Chevrolet | Chevelle | SS | |
| 1971 | Chevrolet | Chevelle | SS | |
| 1972 | Chevrolet | Chevelle | SS | |
| 1969 | Oldsmobile | 442 | ||
| 1970 | Oldsmobile | 442 | ||
| 1971 | Oldsmobile | 442 | ||
| 1968 | Oldsmobile | F85 | ||
| 1969 | Oldsmobile | F85 | ||
| 1970 | Oldsmobile | F85 | ||
| 1968 | Oldsmobile | Vista Cruiser | ||
| 1969 | Oldsmobile | Vista Cruiser | ||
| 1970 | Oldsmobile | Vista Cruiser | ||
| 1971 | Oldsmobile | Vista Cruiser | ||
| 1972 | Oldsmobile | Vista Cruiser | ||
| 1970 | Pontiac | Grand Prix | ||
| 1971 | Pontiac | Grand Prix | ||
| 1972 | Pontiac | Grand Prix | ||
| 1968 | Pontiac | GTO | ||
| 1969 | Pontiac | GTO | ||
| 1970 | Pontiac | GTO | ||
| 1968 | Pontiac | Tempest | ||
| 1969 | Pontiac | Tempest |
Shipping Information
We offer FREE shipping on all orders within Canada. Most orders ship within 1-2 business days.
Standard delivery typically takes 3-7 business days depending on your location.
Returns Policy
We accept returns within 30 days of purchase. Items must be in original condition with all packaging.
For returns or exchanges, please contact our customer service team.

