Mercruiser GM Small Block Exhaust Manifold | Sierra 18-1950-1 Heat Exchangers Replaces Osco 9943S

Replaces Osco 9943S

Engine coupler connects Mercruiser GM engines to stern drives

Thread two 7/16"-20

the platinum tip allows for a quicker and hotter spark

White in color

Mercruiser GM Small Block Exhaust Manifold | Sierra 18-1950-1 Heat Exchangers Replaces Osco 9943SMercruiser GM Small Block Exhaust Manifold Sierra 18 1950 1 Port exhaust manifold fits Mercruiser GM 5. 0L & 5. 7L marine engines with end riser. Mercruiser log style exhaust manifold Direct replacement manifold fits Mercruiser GM V8 small block 305 and 350 cu. in. engines from 1977 to 1982 with end riser For Mercruiser 198, 228, 255, 260, and 898 model engines Port side Heavy duty cast iron Painted black Includes all gaskets, riser studs, and drain