64-72 Sb Chevelle Header

The HEDMAN 64-72 SB Chevelle Header is a street-performance exhaust manifold designed for small-block Chevrolet engines in A-body Chevrolet vehicles from 1964 to 1977. This pair of headers delivers improved exhaust scavenging and flow characteristics compared to factory cast-iron manifolds, making them essential for drivers seeking measurable power gains and responsive engine performance. Built from steel and finished in durable black paint, these headers are engineered for durability and long-term reliability on street-driven vehicles.

With 1.75-inch primary tubes and a 3-inch collector, this header design balances exhaust gas velocity across the RPM range that street engines typically operate in. The primary diameter maintains stronger scavenging at lower and mid-range engine speeds—critical for daily-driven cars where torque delivery matters as much as peak power. The 3-inch collector consolidates exhaust flow efficiently before feeding into your existing exhaust system. Gaskets and mounting hardware are included, eliminating the need for separate purchases. The complete assembly weighs 40.4 pounds.

These headers suit owners of 1964–1977 Chevelles, Novas, and other A-body platforms running small-block Chevrolet engines who want to upgrade their exhaust system without pursuing extreme high-RPM racing applications. Street headers represent the practical middle ground: better flow than stock manifolds, easier installation than full custom systems, and compatibility with standard street driving and tuning practices. Installation typically requires basic hand tools and mechanical familiarity, making this an accessible project for enthusiasts ready to improve their classic Chevrolet's breathing and responsiveness.