Mercrusier 3" exhaust manifold spacer for V6 and V8 engines.

Mercruiser Models:
175-205 - V6, GM 229/262 CID (1983 - 0M SN#'s)
GM V6 & V8 S.B. DRY JOINT ALTERNATIVE (0M SN#'s & Up)
200-320, V8 (S.B.), GM 305/350/377 CID (1983 - 0M SN#'s)
330-370, V8 (B.B.), GM 454/502 CID (1981 & UP)