71-91 Sb Mini Motorhome

The Hedman 71-91 Small Block Chevy Motorhome Headers are engineered performance exhaust manifolds designed specifically for 1971–1991 GM fullsize vans equipped with small block Chevrolet engines. This pair of headers replaces restrictive factory cast-iron manifolds with a tuned primary and collector design, enabling improved exhaust scavenging and measurable gains in engine breathing efficiency.

The headers feature 1.625-inch primary tubes converging into a 3-inch collector, a proven configuration for small block Chevy displacement and RPM ranges typical of van engine swaps and restorations. Constructed from steel with black factory-style paint, they maintain OEM appearance while delivering the thermal and flow characteristics of a performance exhaust system. Gaskets and mounting hardware are included, simplifying installation. The design accommodates the tight engine bay geometry of fullsize vans, where header clearance and ground clearance are critical constraints.

This is an essential upgrade for anyone restoring a 1971–1991 Chevy van with a small block engine or performing a modern small block retrofit. Motorhome builders, custom van enthusiasts, and restoration shops rely on headers like these to unlock engine potential while keeping intake and exhaust temperatures in the optimal range. The complete pair ensures symmetrical scavenging across both cylinder banks, crucial for balanced power delivery and drivability on the road.

Hedman headers are recognized in the small block Chevy aftermarket for consistent fit and manufacturing quality. These 71-91 motorhome headers are a direct bolt-on solution for the specified application, eliminating guesswork during installation and integration with your vehicle's exhaust system.