New Exhaust Bellow For Mercruiser Description: Fits #1, R, MR, TRS, Alpha I, Gen II, Bravo I, II, III and Blackhawk models. Item measures approximately 2 1/2" I.D. at each end and approximately 5 1/4" long. Replaces Mercruiser 18654A1 Fits: Mercruiser 120/140 1978-1982 Mercruiser 165 1978-1981 Mercruiser 260 1978-1982 Mercruiser 470 1978-1982 Mercruiser 485 1980-1982 Mercruiser 898/228 1978-1982 Mercruiser Alpha One Gen I 1983-1990 Mercruiser Alpha One Gen II 1991- Current Mercruiser Bravo I Most All Mercruiser Bravo II Most All Mercruiser Bravo III Most All