Headers 78-88 GM G-Body

The Headers 78-88 GM G-Body (MPN 68020) are purpose-built exhaust manifolds engineered to unlock horsepower and torque from first-generation G-Body platforms, including the Chevrolet Monte Carlo, Regal, and similar mid-sized performance cars. If you're serious about extracting maximum power from your classic GM engine, these headers replace restrictive factory castings that choke exhaust flow and limit breathing efficiency. This is essential upgrade territory for any street or strip G-Body enthusiast looking to move beyond stock performance levels.

These headers feature mandrel-bent tubing construction that maintains consistent diameter through each bend, eliminating the flow restrictions created by factory crimps and collapsed sections. The design optimizes scavenging—the process where exiting exhaust gases help pull fresh fuel mixture into the cylinders—which increases volumetric efficiency across the RPM band. Weighing 24.73 pounds and engineered for tight engine bay fitment (16.8 x 8.6 x 30.35 inches), they integrate with the 1978–1988 G-Body chassis without requiring frame modifications. Superior metalurgy and professional-grade welding ensure reliability under high exhaust temperatures and extended performance driving.

These headers deliver measurable gains for small-block Chevy engines typically found in G-Body vehicles, whether you're running a 305, 350, or stroker combination. Installation requires basic mechanical skill and standard hand tools; plan for a few hours of underbody work. Pair them with a quality exhaust system (cat-back or full 2.5-inch) and a tuned engine for cumulative power gains. They're ideal for weekend warriors, restoration builds, and anyone seeking bolt-on performance that actually moves the needle on dyno sheets.