6" Spacer (Iron Casting) replaces MerCruiser part # 807477A5
For Mercruiser: Model 175-205 GM 229/262 CID V6 (1983-Present) Model 200-320 GM 305/350/377 CID V8 (1983-Present) Model 330-370 GM 454/502 CID V8 (B.B.) (1981-Present)