70-76 4wd 1/2t Bb P/U

The Hedman 70–76 4WD 1/2-ton Pickup Headers are engineered for serious truck builders and restoration enthusiasts who demand authentic, period-correct performance from their classic Chevrolet or GMC four-wheel-drive half-tons. These headers are specifically designed for models produced between 1970 and 1976, ensuring compatibility with the original vehicle specifications.

These headers address the factory exhaust system's restrictive design, which commonly produces back-pressure that limits horsepower and throttle response on stock and mildly modified engines. Hedman headers utilize mandrel-bent primary tubes and an optimized collector design to maximize exhaust velocity and reduce reversion, directly improving cylinder-to-cylinder scavenging and combustion efficiency.

Whether you're restoring a Chevy K5 Blazer or K10 Suburban, Hedman's design respects the original underbody geometry while improving durability for decades of daily driving or weekend adventures. Installation works best with a quality dual exhaust system or custom muffler setup, as these headers flow significantly more exhaust than factory options.