The Gibson replacement header gasket for Toyota 4.7L (2000–2004) restores a proper exhaust seal for your engine and supports the exhaust system that Gibson describes as a single-exit stainless system with a polished tip. Source testing notes average gains of 5–10 hp when paired with compatible components. The gasket is intended for bolt-on installation; systems are backed by a lifetime limited warranty per the source.
Gibson Replacement Header Gasket - Toyota 4.7L (00-04)