Exhaust Riser Kit, MERC 3.0 New exhaust elbow / riser. Direct Mercruiser replacement. Used in 2.5L and 3.0L late model applications from 1982-85 and 1990 and later. 4″ Diameter. Two bolt pattern. Includes mounting hardware, gaskets & exhaust bellow with clamps. Replaces Mercruiser 12076, 12076A2, Sierra 18-1975-1.