64-77 Chevelle Header w/LS Engine

The 64-77 Chevelle Header with LS Engine from HEDMAN is purpose-built for enthusiasts converting classic A-body platforms to modern LS powerplants. Whether you're restoring a Chevelle SS or building a street/strip machine, this header solves the most critical challenge in LS swaps: routing exhaust from a contemporary engine into a chassis originally designed for small-block or big-block Chevrolet mills. This isn't a universal fit—it's engineered specifically for the 1964–1977 Chevelle body, ensuring proper ground clearance, steering column compatibility, and tight engine bay geometry that forced-induction and carbureted builds demand.

HEDMAN headers are constructed from mandrel-bent primary tubes that maintain consistent wall thickness and minimize exhaust gas turbulence, critical for extracting power and spool time in turbocharged or supercharged LS applications. The collector design directs spent gases smoothly into a 2.5-inch outlet, reducing backpressure while accommodating both naturally aspirated and boosted configurations. Weighing 19.54 lbs, the assembly balances durability with weight savings—important in vintage muscle car builds where every pound affects handling and acceleration. The compact 13 x 9 x 22-inch profile fits within tight engine bay constraints of first- and second-generation Chevelles, preventing interference with A/C, power steering, and factory brake lines that often remain in restorations.

LS swap enthusiasts, engine builders, and restoration shops performing modern driveline conversions on 1964–1977 Chevelles will find this header essential for reliable bolt-on fitment and dyno-proven performance gains. Installation requires removing the original exhaust manifolds and mounting the LS headers using the existing exhaust ports on the engine; professional installation is recommended to ensure proper gasket sealing and clearance verification. Pair this header with a quality high-flow catalytic converter and mandrel-bent exhaust tubing to maximize horsepower and torque delivery from your LS platform.