This Product will Prefect fit #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 for Mercruiser 18654A1,32734A3,32734
The Parts Include :
1* Exhaust Bellow
2 * Clamps
2 * Clips

The Bellow With Ridge 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

Dear Custom , Welcome To Our Store ! Please Send your Engine Information To Us If You Can Not Confirm The Part Can Fit To Your Engine , Our Engineer Will Give You Answer Soon .