Exhaust Header Set - LS Swap GM A-Body 64-67

The Exhaust Header Set for LS Swap GM A-Body 64-67 by Doug's Headers is purpose-built for classic muscle car enthusiasts performing modern LS engine swaps into vintage General Motors A-Body platforms. This header set solves a critical fitment challenge: LS engines produce significantly more power than original small-blocks, but their exhaust ports are positioned differently, requiring custom fabrication to integrate seamlessly. Whether you're dropping an LS into a 1964–1967 Chevelle, Skylark, or Cutlass, these headers ensure optimal scavenging and clearance while maintaining the clean underhood appearance modern builders demand.

Doug's Headers engineers these tubes with precision mandrel bends to maximize flow velocity and minimize turbulence, critical factors in LS engine efficiency. The header design accounts for A-Body frame rails, steering components, and suspension geometry to avoid interference without sacrificing tube diameter or runner length—both essential for power delivery across the RPM band. Cast-iron or coated steel construction withstands the extreme thermal environment of modern LS engines while the tuned runner lengths work with the LS's efficient cylinder head design to extend the power band. Weighing 22.2 pounds, this complete header set is engineered for street or strip use without the compromise of cramped fitment or excessive cutting and welding.

Restomod builders, classic car shops, and weekend warriors benefit most from this bolt-on solution, eliminating weeks of custom fabrication labor and guesswork. Installation pairs with a quality cat-back exhaust system to realize the full potential of your LS swap; these headers alone can yield 8–12 horsepower over poorly-routed factory manifolds. The compact 20 x 11 x 25.5-inch footprint fits standard A-Body engine bays when paired with the correct intake manifold and accessories. Verify LS generation compatibility (LS1, LS3, LQ4, etc.) and confirm any required modifications to motor mounts or accessories before purchase, as individual swap variations exist across the A-Body lineup.