Flowmaster
Flowmaster 817409 American Thunder Crossmember-Back Exhaust System
Flowmaster 817409 American Thunder Crossmember-Back Exhaust System
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Description & Features
Flowmaster 817409 American Thunder Crossmember-Back Exhaust System
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.
- 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
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 |
| Drive | 2WD |
| Emission Code | 5 |
| Exhaust Series | American Thunder |
| Exhaust Tip Connection | Clamp-On |
| 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 Diameter | 2.50 |
| Inlet Type | Weld-On |
| Main Piping Diameter | 2.50 |
| Mounting Bracket Included | Yes |
| Muffler (Left) Body Height | 5.00 |
| Muffler (Left) Body Length | 13.50 |
| Muffler (Left) Body Width | 10.00 |
| Muffler (Left) Type | Chambered |
| Muffler (Right) Body Height | 5.00 |
| Muffler (Right) Body Length | 13.50 |
| Muffler (Right) Body Width | 10.00 |
| Muffler (Right) Type | Chambered |
| Muffler Body Height | 5.00 |
| Muffler Body Length | 13.50 |
| Muffler Body Material | 409 Stainless Steel |
| Muffler Body Shape | Oval |
| Muffler Body Width | 10.00 |
| 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 Outside Diameter | 2.63 |
| Muffler Outlet Connection | Slip-Fit |
| Muffler Outlet Quantity | 1 |
| Muffler Part Number | Kit Only |
| Muffler Quantity | 2 |
| Muffler Series | Super 40 Series |
| Muffler Type | Chambered |
| part type | Exhaust System |
| Pipe Color | Silver |
| Pipe Material | 409 Stainless Steel |
| Product Type | Exhaust System |
| Sound Level | Aggressive |
| 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: 67.75 lbs
Dimensions: 59.75 x 16.25 x 15.25 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 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 1968-1972 GM A-Bodies with V8 engine.
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Vehicle Fitment
Vehicle Fitment
- 1968-1969 Buick GS 350 Base
- 1968-1969 Buick GS 400 Base
- 1970-1972 Buick GS 455 Base
- 1970 Buick GS 455 GSX
- 1970-1972 Buick GS Base
- 1970 Buick Skylark 350
- 1972 Buick Skylark 350
- 1968-1972 Buick Skylark Base
- 1968-1972 Buick Skylark Custom
- 1968-1969 Buick Special Base
- 1968-1972 Buick Sportwagon Base
- 1968-1969 Buick Sportwagon Custom
- 1968 Chevrolet Chevelle 300
- 1968-1969 Chevrolet Chevelle 300 Deluxe
- 1970-1972 Chevrolet Chevelle Base
- 1968-1972 Chevrolet Chevelle Concours
- 1969-1972 Chevrolet Chevelle Concours Estate
- 1969-1972 Chevrolet Chevelle Greenbrier
- 1971-1972 Chevrolet Chevelle Heavy Chevy
- 1968-1972 Chevrolet Chevelle Malibu
- 1968-1972 Chevrolet Chevelle Nomad
- 1968 Chevrolet Chevelle Nomad Custom
- 1971-1972 Chevrolet Chevelle SS
- 1968-1970 Chevrolet Chevelle SS 396
- 1970 Chevrolet Chevelle SS 454
- 1968-1972 Chevrolet El Camino Base
- 1968-1972 Chevrolet El Camino Custom
- 1968-1972 Chevrolet El Camino SS
- 1970-1972 Chevrolet Monte Carlo Base
- 1971-1972 GMC Sprint Base
- 1972 GMC Sprint Custom
- 1968-1971 Oldsmobile 442 Base
- 1968-1972 Oldsmobile Cutlass Base
- 1972 Oldsmobile Cutlass Cruiser
- 1968 Oldsmobile Cutlass S
- 1971-1972 Oldsmobile Cutlass S
- 1968-1972 Oldsmobile Cutlass Supreme Base
- 1968-1972 Oldsmobile F85 Base
- 1968-1972 Oldsmobile Vista Cruiser Base
- 1968-1969 Pontiac Beaumont Base
- 1969-1972 Pontiac Grand Prix Base
- 1968-1972 Pontiac GTO Base
- 1970-1971 Pontiac GTO The Judge
- 1968-1972 Pontiac LeMans Base
- 1972 Pontiac LeMans Luxury
- 1969-1970 Pontiac LeMans Safari
- 1970-1972 Pontiac LeMans Sport
- 1971 Pontiac LeMans T37
- 1968-1970 Pontiac Tempest Base
- 1968-1969 Pontiac Tempest Custom
- 1970 Pontiac Tempest GT
- 1968-1969 Pontiac Tempest Safari
