4" Upper Tube Exhaust Pipe coupler for Mercruiser

Replaces Mercruiser 32-44348001, 32-44348T.

 Connects exhaust riser to elbow.

Used for center mounted risers only

Used on Alpha and Bravo, small block and big block V6 and V8 engines

Inside diameter is 4 inches, 4 1/4" length

Cross reference Sierra 18-2748