Indmar EXTCAT port side aluminum one piece exhaust manifold and riser Used on Indmar Vortec 5.7L Monsoon and 6.2L Hammerhead engines with catalyst exhaust systems Engines serial no. 172317 and below require replumbing kit p.n. 495180 if not already updated (see Product Attachments ...Indmar EXTCAT port side aluminum one piece exhaust manifold and riser Used on Indmar Vortec 5.7L Monsoon and 6.2L Hammerhead engines with catalyst exhaust systems Engines serial no.
172317 and below require replumbing kit p.n. 495180 if not already updated (see Product Attachments) Manifold catalyst installed and non-servicable Does not include fittings or decals Painted black Port side only - for starboard side order p.n. 531400HL Manifold Gasket P/N 556202SPEC and Dump Gasket P/N 765006 - sold separately