H2O T-20976 Replacement Exhaust Riser for Mercruiser 44354, 807914, and 807988 Replaces: MerCruiser part# 44354, 807914, and 807988, Barr Part #: MC-20-4435, Sierra Part# 18-1976-1, Marine Power Part #: 0992-400 Fits: 185, 200, 205, 228, 230, 260, 330, 340, 898, 7.4L Used in: GM V6 229 and 262 cu.in., GM Small Block V8 305-350 cu.in., GM Big Block V8 454 cu.in Engines Used with: Manifold T-20952, T-20953, T-20957, Spacer T-20985, and Mounting Kit 20976-MK Backed by a 3 Year Warranty.