65-76 Olds Cutlass 455

The 65-76 Olds Cutlass 455 headers by Hedman deliver the performance and reliability that classic muscle car enthusiasts demand. Designed specifically for the legendary Oldsmobile 455 big-block engine, these headers unlock horsepower and torque while improving exhaust scavenging efficiency. Whether you're restoring a showroom-quality Cutlass or building a street-strip weekend warrior, these headers are engineered to maximize engine breathing and provide measurable power gains over restrictive factory manifolds.

Hedman headers for the 65-76 Oldsmobile Cutlass 455 feature mandrel-bent primary tubes that guide exhaust gases with minimal turbulence and optimal scavenging characteristics. The optimized collector design reduces back-pressure while the precise tube diameter and length match the 455's displacement and RPM band for seamless power delivery across the entire powerband. Built from durable steel construction with quality welds, these headers resist cracking and thermal degradation, ensuring years of reliable service in high-heat engine environments.

These headers are ideal for Cutlass owners seeking to restore original performance or add measurable horsepower to their classic muscle cars. Installation fits 1965–1976 Oldsmobile Cutlass models equipped with the 455 cubic-inch engine, and compatibility with both automatic and manual transmissions makes this upgrade accessible to most enthusiasts. The 32.7 lb weight and compact 46.1-inch length allow for straightforward fitment within factory engine bay constraints, making these headers a practical choice for restorations that maintain originality while improving mechanical performance.