Sierra Riser - Mercruiser

\Replaces\ Mercruiser 44354A3, 44354A9,  44354A10, 44354A13, 807914A1, 807988A2, 807988A03\nMarine Power 0992-400, Barr MC-20-44354\n\Fits\ Most Mercruiser V-6 & V-8  applications 7° (4” O.D. Riser) Comes with S18-0897, S18-4263 & S18-4258\nUse with\nManifold S18-1952-1, S18-1953-2, S18-1957-2\nRiser Gasket S18-0897 restrictor, S18-2849-1 open, S18-0672 blocked\nMounting Kit S18-8505