Sierra 18-2176 OMC 908063 0908063 Ball Bear Stringer Intermediate Housing SEI Exhaust Manifold Specifics: 12-3/4" x 21P

Specifics: 12-3/4" x 21P

1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999

This has the 3" Throat opening for 2-barrel Rochester & MerCarb carburetors

Carb Body: 379033

Sierra 18-2176 OMC 908063 0908063 Ball Bear Stringer Intermediate Housing SEI Exhaust Manifold Specifics: 12-3/4" x 21PPart Number(s) Included Sierra 18 2176 > Replaces OMC 908063 0908063 Ball Gear Aftermarket Ball Gear both Sierra & SEI sold the same one and can be used to replace an OEM ball gear as well. Still a lot of life yet About 85%+ Remaining (see pictures) General Application Compatibility OMC Stringer Intermediate Housing Side Ball Gear All OMC Stringer Sterndrive applications 1973 1985 i. e. 4cyl, 6cyl V6, V8 120hp,140hp,165hp, 170hp, 175hp, 190hp ,225hp