Mercruiser big block GM exhaust manifold. Replaces 89011 , 89011A8 , 807078A6 & 807078T10 , GLM 51240 , Bar MC-1-89011 , Sierra 18-1957-1 & Osco 9011.Applicaction Includes all 7.4 liter 454 and 8.2 liter 502 cid center riser mercruiser application with standard exhaust.
Includes all gasket and bolts.
3 year warranty