Flowmaster American Thunder Crossmember-Back Exhaust System (67-74 V8 Firebird)Find parts that fit my vehicle

Premium Dual Exhaust. The Flowmaster American Thunder Crossmember-Back Exhaust System enhances exhaust flow and delivers the signature deep tones appreciated by classic muscle car enthusiasts. Designed to improve performance while producing a moderate tone inside and out, it balances authentic muscle car acoustics with overall sound control.

Construction and Appearance. Constructed from aluminized steel with 16-gauge mandrel-bent tubing, this system features a durable black high-temperature paint finish on the chambered 80 Series Crossflow muffler. Its design provides corrosion resistance and a clean, functional look that tucks discreetly behind the rear differential for maximum ground clearance.

Installation. Installation is straightforward with included hangers, clamps, hardware, and clear illustrated instructions. This direct-fit system attaches without modifications and works with factory manifolds or headers, although manifold downpipes or header reducer cones are not included.

Warranty. Covered by a 3-year limited warranty, ensuring confidence in its quality and performance.

Application. Specifically engineered for 1967-1974 Chevrolet Camaro and Pontiac Firebird V8 models, as well as 1968-1974 Chevrolet Nova/Chevy II V8 engines. Convertible models require 3/8-inch shims on the stock factory X-brace or a specific convertible brace to ensure proper clearance.

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