67-81 Firebird/Trans Am

The Hedman 67-81 Firebird/Trans Am headers represent a serious upgrade for anyone looking to unlock horsepower and improve exhaust flow on classic Pontiac A-Body and F-Body platforms. Whether you're restoring a second-generation Firebird, building a street-legal Trans Am, or modifying your daily driver, these street headers deliver measurable gains in scavenging efficiency and throttle response. Built specifically for the Pontiac V8 engine family, they replace restrictive factory manifolds that choke off exhaust gases and rob your engine of potential.

Hedman engineered these headers with stepped primary tubes ranging from 1.625 to 2 inches, optimized to match the exhaust velocity curve of your V8 and prevent backpressure buildup across the RPM band. The 3-inch collector consolidates gases smoothly into your exhaust system, reducing turbulence and heat soak that degrades performance. Constructed from heavy-duty steel and finished in durable black paint, the headers arrive with all gaskets and mounting hardware included—no hunting for oddball fasteners or sealing materials. The pair weighs 25.65 pounds and measures 16.5 x 8.6 x 39.1 inches, fitting within typical hood clearance and engine bay dimensions for 1967–1981 Firebirds and Trans Ams.

Serious Pontiac enthusiasts, weekend racers, and restoration professionals choose Hedman headers for their proven track record of reliability and consistent power gains on stock and lightly modified engines. Installation is straightforward on most applications; bolt them to your cylinder head flanges, connect to your existing collector or install a matching cat-back system, and you're ready to feel the difference. These headers work equally well on street machines prioritizing throttle response or restorations seeking period-correct performance upgrades. Verify fitment with your specific year, engine displacement, and any existing headers or exhaust components before purchase.