Mercury Marine's MerCruiser Exhaust Tube Assembly 78458A1 is a genuine factory OEM component designed for MerCruiser stern drives. This tube supersedes the older 78458 part and is listed as compatible with MerCruiser R, MR, Alpha One and Alpha One Gen II, as well as Blackhawk bellhousing configurations. Weighing approximately 0.38 lb, the assembly measures about 5.0 in long by 4.0 in wide by 4.0 in high and carries GTIN 745061179462 for easy identification. As an OEM Mercury part, it provides the proper fit and routing for exhaust systems within Bell Housing assemblies across these MerCruiser platforms.
