Barr MC-20-12076 Replacement 2.5 and 3.0-Liter Mercruiser U-Shaped with off-set 2-bolt mounting Riser. Riser uses only 2-bolts for mounting to manifold. Replaces Mercruiser part 12076A1 & 12076A2. Also Replaces OSCO part 2076. Fits 2.5 & 3.0-Liter engines. Riser mounting flange with square bolt pattern (2-13/16" x 3-1/16" bolt centers). Complete with mounting bolts and gasket. Made in USA, 3-year limited warranty.