63-82 Corvette 396-454

The Hedman 63-82 Corvette 396-454 headers are purpose-built exhaust manifold replacements designed for first and second-generation Corvettes equipped with big-block engines. These headers represent a critical upgrade path for enthusiasts serious about maximizing engine output and improving underhood airflow. Whether you're restoring a classic 1963–1982 Corvette or building a high-performance restomod, quality headers are essential for unlocking the full potential of 396 and 454 cubic-inch powerplants.

Hedman headers are engineered with mandrel-bent tubing construction and optimized collector sizing to minimize backpressure while maintaining scavenging efficiency across the RPM band. The design accounts for the firing order and cylinder layout of big-block Chevy engines, ensuring each runner length promotes smooth gas evacuation and prevents cross-cylinder interference. Proper header geometry directly impacts volumetric efficiency, throttle response, and fuel atomization—factors that compound into measurable horsepower and torque gains.

The 27.3-pound assembly fits within standard engine bay dimensions while clearing steering components and brake lines on 1963–1982 Corvette chassis. Restorers and performance builders rely on these headers when transitioning from cast-iron manifolds to optimized tubular designs. The 63-82 fitment window covers the entire C2 and early C3 generation, making this upgrade compatible with 396-powered 1963-1968 models and all 454-equipped 1970-1971 models.