Flowmaster
Flowmaster 817940 American Thunder Crossmember-Back Exhaust System
Flowmaster 817940 American Thunder Crossmember-Back Exhaust System
Low stock: 2 left
Couldn't load pickup availability
Description & Features
Flowmaster 817940 American Thunder Crossmember-Back Exhaust System
This Flowmaster American Thunder dual exhaust system is specifically designed for 1967-1972 Chevrolet and GMC K10, K15/K1500, K20, and K25/K2500 4wd trucks with V8 engines. The system is perfect for the person looking for an aggressive to moderate interior and exterior sound level. Starting at the Crossmember-Back, the exhaust comes complete with a built-in H-pipe crossover for better exhaust scavenging, all mandrel-bent 2.50-inch stainless steel tubing, a pair of Super 44 Series performance mufflers, and your choice of three tailpipe exits (Turndown behind rear tires, side exit behind rear tires, or straight out the back under the bumper). The system includes all hardware necessary for installation and is covered by our Lifetime Limited Warranty. Fits both short and long wheelbase trucks.
- Crossmember-Back Design Works with Stock Manifolds or Headers, Allowing More Application Options
- 16-Gauge, 2.50-Inch 409 Stainless Steel Pipes add Durability and Strength
- Super 44 Mufflers Deliver Increased Performance and an Aggressive to Moderate Sound Level
- Three Different Tailpipe Exit Options Allow You to Tailor the Look of the Kit to Your Style
- Mandrel-Bent Pipes Help to Maximize the Exhaust Flow for Better Performance
- H-Pipe Style Crossover Helps Exhaust Gas Scavenging and Reduces Drone
- Includes Hangers and Hardware for Installation
- Lifetime Limited Warranty
Specifications
| Brand | Flowmaster |
| California Proposition 65 | Yes |
| California Proposition 65 Chemical Name | Chromium (hexavalent compounds) |
| CARB (California) Compliant | Yes |
| Catalytic Converter Included | No |
| Catalytic Converter Quantity | 0 |
| Category | Exhaust |
| Clamping Type | Flat Band |
| Clamps Included | Yes |
| Emission Code | 5 |
| Exhaust Series | American Thunder |
| Exhaust Tip Quantity | Sold Separately |
| Exhaust Tip Shape | Round |
| Exit Style | Dual Out Rear |
| Finish | Natural |
| Gasket Or Seal Included | No |
| Grade Type | Performance |
| Hangers Included | Yes |
| Heat Shield Included | No |
| Inlet Type | Weld-On |
| Main Piping Diameter | 2.50 |
| Mount Type | Uses New Hangers (Included) |
| Mounting Bracket Included | Yes |
| Muffler (Left) Body Height | 4.00 |
| Muffler (Left) Body Length | 13.25 |
| Muffler (Left) Body Width | 9.50 |
| Muffler (Left) Type | Chambered |
| Muffler (Right) Body Height | 4.00 |
| Muffler (Right) Body Length | 13.25 |
| Muffler (Right) Body Width | 9.50 |
| Muffler (Right) Type | Chambered |
| Muffler Body Height | 4.00 |
| Muffler Body Length | 13.25 |
| Muffler Body Material | 409 Stainless Steel |
| Muffler Body Shape | Oval |
| Muffler Body Width | 9.50 |
| Muffler Color | Black |
| Muffler Finish | Black High-Temperature Paint Finish |
| Muffler Flanged Inlet | No |
| Muffler Flanged Outlet | No |
| Muffler Included | Yes |
| Muffler Inlet Connection | Slip-Fit |
| Muffler Inlet Inside Diameter | 2.50 |
| Muffler Inlet Location | Offset |
| Muffler Inlet Outside Diameter | 2.63 |
| Muffler Outlet Connection | Slip-Fit |
| Muffler Outlet Diameter | 2.50 |
| Muffler Outlet Quantity | 1 |
| Muffler Overall Length | 19.50 |
| Muffler Part Number | Kit Only |
| Muffler Quantity | 2 |
| Muffler Series | Super 44 |
| Muffler Type | Reflection |
| part type | Exhaust System |
| Pipe Color | Silver |
| Pipe Material | 409 Stainless Steel |
| Product Type | Exhaust System |
| Sound Level | Aggressive / Moderate |
| Spring Bolt Kit Included | No |
| Sub Category | Exhaust and Tail Pipes |
| Tail Pipe Outlet Outside Diameter | 2.50 |
| Tail Pipe Quantity | Dual |
| Tail Pipe Tapered Outlet | No |
| Type | Crossmember-back |
| Valve Included | No |
| Valve Type | Not Applicable |
| Warning | California Proposition 65 |
Packaging Information
Weight: 85.45 lbs
Dimensions: 49 x 25 x 14 IN
Safety
⚠ WARNING: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information visit www.P65Warnings.ca.gov
Warranty
Installation Instructions
⚠ Fitment Notes
- Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
- Manifold down pipes and header reducers not included. Fits both long and short bed trucks.
Share
Vehicle Fitment
Vehicle Fitment
- 1967-1972 Chevrolet K10 Pickup Base
- 1967-1972 Chevrolet K20 Pickup Base
- 1967-1972 GMC K15/K1500 Pickup Base
- 1967-1972 GMC K25/K2500 Pickup Base
