Coated Headers - GM Truck w/SBC

The Coated Headers for GM Truck w/SBC from HEDMAN are purpose-built exhaust manifolds designed for Small Block Chevy engines installed in General Motors light-duty trucks. These headers replace restrictive factory cast-iron manifolds, allowing exhaust gases to exit more efficiently and improving overall engine breathing. Whether you're building a classic restoration, upgrading a work truck, or maximizing performance on a weekend rig, quality headers are foundational to any serious engine modification program.

HEDMAN's coated construction combines tuned primary tube diameter with a protective ceramic or metallic coating that resists corrosion, thermal cycling, and heat damage while reducing under-hood temperatures. The coating preserves header longevity in harsh truck environments and improves radiant heat management, keeping engine bay components safer during extended use. Proper exhaust scavenging through optimized tube length and diameter increases volumetric efficiency, translating to measurable gains in horsepower and torque across the RPM range without requiring fuel system recalibration.

These headers fit GM trucks equipped with Small Block Chevy powerplants and work best paired with a compatible exhaust system and intake upgrade to realize full potential. Installation requires disconnecting the factory manifolds and fitting the new headers into the existing mounting points; most experienced mechanics complete the job in 2–4 hours with standard hand tools. The 36.6 lb weight and compact 16.5 x 8.5 x 39.5 inch package ensure straightforward fitment without major chassis modifications, making this an accessible upgrade for both restoration shops and performance enthusiasts seeking reliable, proven hardware.