Coated Headers - Pontiac V8 326/350/400

The Coated Headers for Pontiac V8 326/350/400 from Dougs Headers are engineered for serious enthusiasts looking to unlock the full potential of classic Pontiac powerplants. Whether you're restoring a GTO, Lemans, or Firebird, quality headers are foundational to breathing improvements and horsepower gains. These coated headers replace restrictive OEM cast-iron manifolds, allowing exhaust gases to flow more freely and efficiently from the cylinder head to the collector, which translates directly to improved scavenging and engine response across the RPM band.

Dougs Headers manufactures these units from premium mandrel-bent tubing with a durable thermal coating applied to the exterior, a design choice that serves dual purposes: the coating reduces radiant heat in the engine bay while protecting the steel from corrosion and discoloration. The mandrel-bending process ensures smooth internal radius bends, minimizing flow turbulence compared to welded alternatives. The 326/350/400 designation confirms compatibility across Pontiac's big-block V8 displacement range, with the headers sized and collector geometry optimized for each engine's stock displacement and port configuration. This precision fit ensures proper bolt-on installation without modifications to engine bay components.

Mechanics and restoration shops routinely specify Dougs Headers for Pontiac V8 builds targeting 20–40 horsepower gains in combination with intake and carburetor upgrades. Installation is straightforward on most second-generation A-bodies and early F-bodies, though tight engine bays may require minor firewall clearance verification before purchase. The coated finish maintains appearance over time better than bare steel, reducing the need for frequent repainting or coating maintenance. Bolt directly to factory-style exhaust flanges; pairing these headers with a quality exhaust system and tuned intake manifold delivers the most dramatic improvement in throttle response and top-end power output.