LS Swap Cast Iron Exhaust Manifold Headers Chevrolet LS1 LS2 LS3 4.8L 5.3L 6.0L. Cast Iron Exhaust Manifolds have been designed to hug close to the engine block so they fit into a wide variety of replacement and engine-swap applications.Their contoured design aims the exhaust directly at the exit port for improved flow. Being cast iron means they will provide years of leak-free performance with less under hood noise than traditional headers. Plus, their shorty design means you can route exhaust tubing close to your frame/floor pan for maximum ground clearance. Comes with (2) Exhaust Flanges & Exhaust Flange Gaskets (As Pictured). For LS motor swap on older Chevy, GM, Pontiac, Olds, Buick models. Fits LS based engines LS1, LS2, LS3, LS6, LS7, etc. Tight tuck-in fit that allows fitment flexibility. Cast from high silicon molybdenum ductile iron. Extraordinary durability under high working pressure and temperature. Great resistance against corrosion and oxidation.
As-cast finish for a factory appearance. No instructions provided; professional install recommended. Will NOT fit LS4 engines.Will NOT work on standard SBC or BBC.