70-81 Sb Camaro Header

The HEDMAN 70-81 Small Block Camaro Header (Part 65104) is a street-performance exhaust manifold designed specifically for 1970–1981 Chevrolet Camaro and other GM F-Body and X-Body vehicles equipped with small-block Chevy engines. This header delivers measurable gains in exhaust scavenging efficiency compared to factory cast-iron manifolds, translating to improved throttle response and horsepower at the crank.

The header features 1.75-inch primary tubes that merge into a 3-inch collector, a geometry optimized for small-block displacement and RPM range. The tubing diameter directly impacts exhaust velocity and scavenging—smaller primaries accelerate exhaust gas movement at lower engine speeds, improving mid-range torque, while the stepped 3-inch collector provides the transition needed for street carburetors and intake manifolds. The unit ships as a pair with all gaskets and mounting hardware included, eliminating sourcing delays. Black paint finish resists high-temperature oxidation under the hood, though ceramic coating may be applied for enhanced durability in high-heat builds. The 33.33-pound weight reflects mandrel-bent steel construction, which maintains tube wall thickness during bending and ensures consistent flow characteristics.

This header is built for street drivers seeking reliable power gains without carburetor or intake modifications. It suits restorations, muscle car projects, and weekend drivers who prioritize bolt-on simplicity. Installation requires engine bay clearance typical of F-Body chassis—confirm fitment with engine bay photos and existing manifold configuration. The 70-81 Camaro Header integrates with stock or mildly upgraded fuel systems and works within factory or mildly tuned ignition timing windows.

HEDMAN headers are recognized in the street-performance market for manufacturing consistency and aggressive tuning on budget. This model competes directly with other street small-block headers in the 1.75-inch primary class and represents a proven solution for second-generation Camaro builds seeking accessible performance without full engine bay rework.