Mercruiser 807078T08 Big block exhaust manifold with E-Coating. Fits Mercruiser 7.4-LITER (454 CID) and 8.2-Liter (502 CID) engines with center riser (1983 and newer). Economical E-COATED for longevity. Mercury Marine original equipment quality at aftermarket pricing. Fits both port and starboard side of engine. 1-Year limited warranty.