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Supplier details checked 2026-09-23 · Test catalog
Fits 1967-1974 Chevrolet Camaro, Pontiac Firebird and 1968-1974 Chevrolet Nova with V8 engine, 2.5" pipes - Moderate sound
Flowmaster American Thunder Crossmember-Back Exhaust System
Does Not Include Manifold Downpipes or Header Reducers
Includes Hangers and Hardware for Easy Installation
H-pipe Crossover for Maximum Power and Deep Tone
Mandrel-bent 16-gauge Aluminized Steel Tubing
Moderate Exterior Exhaust Tone
Maximum Ground Clearance
Crossmember-Back System
"Works with Factory manifolds or headers. Connector pipes not included.
Flowmaster 67-74 Camaro/Nova 2.5in. American Thunder Crossmember-Back Exhaust System
6774 CAMARONOVA 25 AMT
SYS 67-74 CAMARO/NOV
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.
SYS 67-74 CA
