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Flowmaster is proud to introduce our American Thunder dual exhaust system for 1967-1974 Camaro and Firebird, and 1968-1974 Nova. The system features our exclusive 80 Series Crossflow performance muffler that tucks up high behind the rear differential. Other features include all mandrel-bent dual 2.50-inch head pipes with a built-in H-pipe crossover and dual 2.50-inch tailpipes for a deep rich sound and optimum performance. This Crossmember-Back aluminized steel exhaust system gives these classic muscle cars a moderate tone inside and out. The system includes all parts, hardware and illustrated instructions and is covered by our 3-year Limited Warranty. If you prefer Stainless steel construction, check out optional system# 817104 which comes with a Lifetime Limited Warranty. Notes: Does not include manifold downpipes or header reducer cones. Convertible models will require adding 3/8-inch of shims to the stock factory X-brace for clearance or purchasing Hotchkis Performance Convertible brace Part# 1404.
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
| CARB (California) Compliant | Yes |
|---|---|
| Catalytic Converter Included | No |
| Catalytic Converter Quantity | 0 |
| Category | Exhaust |
| Clamping Type | U-Bolt |
| Clamps Included | Yes |
| Country Of Origin | US |
| Drive | 2WD |
| Emission Code | 5 |
| Exhaust Series | American Thunder |
| Exhaust Tip Quantity | Sold Separately |
| Exhaust Tip Shape | Round |
| Exit Style | Dual Out Rear |
| Finish | Aluminized |
| 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 (Rear) Body Height | 4.00 |
| Muffler (Rear) Body Length | 18.00 |
| Muffler (Rear) Body Width | 9.75 |
| Muffler (Rear) Finish | Black High-Temperature Paint Finish |
| Muffler (Rear) Type | Chambered |
| Muffler Body Length | 13.00 |
| Muffler Body Material | Aluminized Steel |
| Muffler Body Shape | Oval |
| 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 | 42585 |
| Muffler Quantity | 1 |
| Muffler Series | 80 Series Crossflow |
| Muffler Type | Chambered |
| Part Type | Exhaust System |
| Pipe Color | Silver |
| Pipe Material | Aluminized Steel |
| Product Type | Exhaust System |
| Sound Level | Moderate |
| Spring Bolt Kit Included | No |
| Street Legal | 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 |
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)).
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