Headers 68-76 Olds Car 400-455 Engine

The HEDMAN Headers 68-76 Olds Car 400-455 Engine street performance header set is purpose-built for classic Oldsmobile muscle car enthusiasts seeking serious exhaust scavenging efficiency without sacrificing street drivability. This long-tube header design features 1.75-inch primary tubes and a 3-inch collector, engineered to extract maximum flow from the legendary 400 and 455 cubic-inch Oldsmobile big-block engines while maintaining the manageability required for street use and daily driving.

The 1.75-inch primary diameter strikes a critical balance—large enough to minimize backpressure and allow the 400-455's substantial displacement to breathe freely, yet optimized to maintain mid-range torque delivery that street motors require. The long-tube configuration routes exhaust away from the engine bay, improving underhood cooling and reducing radiant heat. Silver ceramic coating protects against thermal stress while maintaining a show-quality appearance. The set includes all necessary gaskets and hardware for installation on Oldsmobile G-Body vehicles from 1968 to 1976, eliminating fitment guesswork and reducing installation time.

This header set addresses the specific demands of owners who demand both performance and reliability from period-correct Oldsmobile big-block platforms. Whether building a restomod, upgrading a survivor car, or maximizing output on an existing 400-455 engine, these headers deliver measurable horsepower and torque gains while maintaining streetable characteristics. The included gaskets ensure proper sealing against exhaust leaks that would compromise performance and increase noise. At 32 pounds, the complete pair integrates into classic muscle car chassis without adding significant weight penalty.