A direct swap for the factory manifold on GM LS engines, this header uses larger-diameter primary tubes to reduce backpressure.

Construction and Finish:

• 1 5/8 in. primary tube diameter for optimized exhaust velocity.
• 2.50 in. collector diameter for a smooth transition into the exhaust system.
• 304 Stainless Steel construction with a polished finish for durability.
• Sold as a Pair, complete with mounting hardware and gaskets for installation.