1969 Exhaust Manifolds

[Brandon K.]

Hi... Can anyone please give me the casting numbers for 69 s/b manifolds? Did all of these have the ports for the AIR system? thanks, Brandon

[Mike Cobine]

Re: 1969 Exhaust Manifolds

3872765 l/h
3932461 r/h

[Mike Cobine]

Re: 1969 Exhaust Manifolds

3872765 l/h
3932461 r/h

[Joe L.]

Re: 1969 Exhaust Manifolds

Brandon-----

ALL 1969 Corvette small blocks used exhaust manifolds with AIR fittings since all 1969 Corvette small blocks originally used AIR.

ALL examples of the GM casting #3872765 left side exhaust manifold are machined for AIR fittings, regardless of when the manifold was manufactured (this manifold was originally used in PRODUCTION for the 1966 model year and was last used for the 1971 model year).

The 3932461 right side manifold was manufactured both with and without drilled and tapped fittings. The ones used on Corvettes during 1969 had the fittings; after 1969, this casting was used for quite a few years and some do not have the fittings.

[Joe L.]

Re: 1969 Exhaust Manifolds

Brandon-----

ALL 1969 Corvette small blocks used exhaust manifolds with AIR fittings since all 1969 Corvette small blocks originally used AIR.

ALL examples of the GM casting #3872765 left side exhaust manifold are machined for AIR fittings, regardless of when the manifold was manufactured (this manifold was originally used in PRODUCTION for the 1966 model year and was last used for the 1971 model year).

The 3932461 right side manifold was manufactured both with and without drilled and tapped fittings. The ones used on Corvettes during 1969 had the fittings; after 1969, this casting was used for quite a few years and some do not have the fittings.