Flowmaster American Thunder Crossmember-Back Exhaust System
- Mfg Part #
- 817409
- SKU
- FLO817409
- Brand
-
Flowmaster
- Fitment Note
- Aggressive sound; Super 40 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes; Small Block Chevy Swap; Big Block Chevy Swap; LS Swap; LT Swap.
Fits 1968 to 1972 Buick GS, GS 350, GS 400 and 4 more models, and 4 more makes. See every vehicle
- H-pipe Crossover for Maximum Power and Deep Tone
- Super 40 Series Mufflers for Deep Powerful Sound
- Mandrel-bent 16-gauge Stainless Steel Tubing
- Includes Hangers and Hardware for Installation
- Aggressive Exterior Exhaust Tone
- Crossmember-Back True Dual Exhaust System
- Does Not Include Header Reducers or Downpipes for Factory Manifolds
- Lifetime Limited Warranty
$1,565.13 CAD
Ships Oct 22
Free shipping in Canada, ships Oct 22
Availability:
This item is available at a partner warehouse.
In stock
At our Burlington, Ontario store: same-day pickup is typically available, or it ships on the date shown.
External warehouse stock
At a partner warehouse: we order it right away and it ships on the date shown.
Manufacturer stock
Available at the manufacturer: we order it for you right away and it ships on the date shown.
Backorder
Backordered at the supplier, availability unknown: we order it right away and allow about 2 weeks before your order ships. Contact us to check.
Universal Fitment
Does this fit your vehicle?
Description
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.
Warranty: Manufacturer's Limited Lifetime Warranty
Fits these vehicles
| Year | Make | Model | Submodel | Engine |
|---|---|---|---|---|
| 1970 - 1972 | Buick | GS | Base | 5.7L 350 V8 |
| 1968 - 1969 | Buick | GS 350 | Base | 5.7L 350 V8 |
| 1968 - 1969 | Buick | GS 400 | Base | 6.6L 400 V8 |
| 1970 | Buick | GS 455 | Base, GSX | 7.5L 455 V8 |
| 1971 - 1972 | Buick | GS 455 | Base | 7.5L 455 V8 |
| 1968 | Buick | Skylark | Base, Custom | 5.7L 350 V8, 6.6L 400 V8 |
| 1969 | Buick | Skylark | Base, Custom | 5.7L 350 V8 |
| 1970 | Buick | Skylark | 350, Base, Custom | 5.7L 350 V8, 7.5L 455 V8 |
| 1971 | Buick | Skylark | Base, Custom | 5.7L 350 V8, 7.5L 455 V8 |
| 1972 | Buick | Skylark | 350, Base, Custom | 5.7L 350 V8 |
| 1968 - 1969 | Buick | Special | Base | 5.7L 350 V8 |
| 1968 - 1969 | Buick | Sportwagon | Base, Custom | 5.7L 350 V8, 6.6L 400 V8 |
| 1970 | Buick | Sportwagon | Base | 5.7L 350 V8, 7.5L 455 V8 |
| 1971 - 1972 | Buick | Sportwagon | Base | 5.7L 350 V8 |
| 1968 | Chevrolet | Chevelle | 300, 300 Deluxe, Concours, Malibu, Nomad, Nomad Custom, SS 396 | 5.0L 307 V8, 5.3L 327 V8, 6.5L 396 V8 |
| 1969 | Chevrolet | Chevelle | 300 Deluxe, Concours, Concours Estate, Greenbrier, Malibu, Nomad, SS 396 | 5.0L 307 V8, 5.7L 350 V8, 6.5L 396 V8 |
| 1970 | Chevrolet | Chevelle | Base, Concours, Concours Estate, Greenbrier, Malibu, Nomad, SS 396, SS 454 | 5.0L 307 V8, 5.7L 350 V8, 6.6L 402 V8, 7.4L 454 V8 |
| 1971 - 1972 | Chevrolet | Chevelle | Base, Concours, Concours Estate, Greenbrier, Heavy Chevy, Malibu, Nomad, SS | 5.0L 307 V8, 5.7L 350 V8, 6.6L 402 V8, 7.4L 454 V8 |
| 1968 | Chevrolet | El Camino | Base, Custom, SS | 5.0L 307 V8, 5.3L 327 V8, 5.4L 327 V8, 5.7L 350 V8, 6.5L 396 V8 |
| 1969 | Chevrolet | El Camino | Base, Custom, SS | 5.0L 307 V8, 5.3L 327 V8, 5.7L 350 V8, 6.5L 396 V8 |
| 1970 | Chevrolet | El Camino | Base, Custom, SS | 5.0L 307 V8, 5.7L 350 V8, 6.5L 396 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8 |
| 1971 - 1972 | Chevrolet | El Camino | Base, Custom, SS | 5.0L 307 V8, 5.7L 350 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8 |
| 1970 - 1972 | Chevrolet | Monte Carlo | Base | 5.7L 350 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8 |
| 1971 | GMC | Sprint | Base | 5.0L 307 V8, 5.7L 350 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8 |
| 1972 | GMC | Sprint | Base, Custom | 5.0L 307 V8, 5.7L 350 V8, 6.6L 400 V8, 6.6L 402 V8, 7.4L 454 V8 |
| 1968 - 1969 | Oldsmobile | 442 | Base | 6.6L 400 V8, 7.5L 455 V8 |
| 1970 - 1971 | Oldsmobile | 442 | Base | 7.5L 455 V8 |
| 1968 | Oldsmobile | Cutlass | Base, S | 5.7L 350 V8, 6.6L 400 V8 |
| 1969 | Oldsmobile | Cutlass | Base | 5.7L 350 V8 |
| 1970 | Oldsmobile | Cutlass | Base | 5.7L 350 V8, 7.5L 455 V8 |
| 1971 | Oldsmobile | Cutlass | Base, S | 5.7L 350 V8, 7.5L 455 V8 |
| 1972 | Oldsmobile | Cutlass | Base, Cruiser, S | 5.7L 350 V8, 7.5L 455 V8 |
| 1968 - 1970 | Oldsmobile | Cutlass Supreme | Base | 5.7L 350 V8 |
| 1971 - 1972 | Oldsmobile | Cutlass Supreme | Base | 5.7L 350 V8, 7.5L 455 V8 |
| 1968 - 1969 | Oldsmobile | F85 | Base | 5.7L 350 V8 |
| 1970 | Oldsmobile | F85 | Base | 5.7L 350 V8, 7.5L 455 V8 |
| 1971 | Oldsmobile | F85 | Base | 5.7L 350 V8 |
| 1972 | Oldsmobile | F85 | Base | 5.7L 350 V8, 7.5L 455 V8 |
| 1968 - 1969 | Oldsmobile | Vista Cruiser | Base | 5.7L 350 V8, 6.6L 400 V8 |
| 1970 - 1972 | Oldsmobile | Vista Cruiser | Base | 5.7L 350 V8, 7.5L 455 V8 |
| 1968 | Pontiac | Beaumont | Base | 5.0L 307 V8, 5.3L 327 V8, 5.7L 350 V8, 6.5L 396 V8 |
| 1969 | Pontiac | Beaumont | Base | 5.0L 307 V8, 5.7L 350 V8, 6.5L 396 V8 |
| 1969 | Pontiac | Grand Prix | Base | 6.6L 400 V8, 7.0L 428 V8 |
| 1970 - 1972 | Pontiac | Grand Prix | Base | 6.6L 400 V8, 7.5L 455 V8 |
| 1968 - 1969 | Pontiac | GTO | Base | 6.6L 400 V8 |
| 1970 - 1971 | Pontiac | GTO | Base, The Judge | 6.6L 400 V8, 7.5L 455 V8 |
| 1972 | Pontiac | GTO | Base | 6.6L 400 V8, 7.5L 455 V8 |
| 1968 | Pontiac | LeMans | Base | 5.7L 350 V8, 6.6L 400 V8 |
| 1969 | Pontiac | LeMans | Base, Safari | 5.7L 350 V8, 6.6L 400 V8 |
| 1970 | Pontiac | LeMans | Base, Safari, Sport | 5.7L 350 V8, 6.6L 400 V8, 7.5L 455 V8 |
| 1971 | Pontiac | LeMans | Base, Sport, T37 | 5.7L 350 V8, 6.6L 400 V8, 7.5L 455 V8 |
| 1972 | Pontiac | LeMans | Base, Luxury, Sport | 5.7L 350 V8, 6.6L 400 V8, 7.5L 455 V8 |
| 1968 - 1969 | Pontiac | Tempest | Base, Custom, Safari | 5.7L 350 V8, 6.6L 400 V8 |
| 1970 | Pontiac | Tempest | Base, GT | 5.7L 350 V8, 6.6L 400 V8 |