63-82 Corvette 396-454

The Hedman 63-82 Corvette 396-454 headers represent a purpose-built exhaust solution for classic big-block Chevrolet engines in second and third-generation Corvettes. Designed specifically for street use, these headers solve a critical problem that many Corvette enthusiasts face: restrictive factory exhaust manifolds that choke high-displacement engines and limit both power delivery and engine longevity. Whether you're restoring a vintage Corvette or upgrading an existing engine build, these headers provide the foundation for improved exhaust scavenging and reliable performance.

Constructed from mandrel-bent steel tubing with 1.75-inch primary tubes and a 3-inch collector, these headers optimize exhaust gas velocity across the RPM range typical of street-driven big-block Corvettes. The stepped primary diameter prevents back-pressure buildup while maintaining scavenging efficiency under part-throttle and cruise conditions—critical for drivability. Finished in durable black paint to resist heat and corrosion, the set includes all necessary gaskets and hardware for installation, eliminating the need for sourcing fasteners separately. The pair configuration ensures proper left and right-side fitment without modification to stock engine bay geometry.

These headers are engineered for Corvette models spanning 1963 through 1982, accommodating both 396 and 454 cubic-inch big-block variants with identical core design principles. Experienced mechanics and Corvette restorers rely on Hedman headers for their consistent fitment and proven thermal management. Installation requires basic hand tools and mechanical knowledge; the included gaskets ensure a proper seal without additional sealing compound, though double-gasketing is recommended for maximum longevity in high-heat environments. This direct-fit solution integrates seamlessly with stock Corvette chassis and cooling systems, making it ideal for both restorations and street performance upgrades.