H2O T-20971 Replacement Exhaust Riser for Mercruiser 76351, 60426, 49964 Replaces: Mercruiser part# 76351, 60426, and 49964; Barr part# MC-20-60425 and MC-20-76351; Sierra part# 18-1971 Fits: Models 165, 198, 200, 228, 898 Used in: GM inline Six Cylinder 250 & 292 cu.in. and Small Block V8 305-350 cu.in. Used with: Mounting Kit 26371-MK Backed by a 3 Year Warranty.