1973-1982 Corvette Exhaust Manifold Casting Numbers

1973-1974 Big Block

Left Right Engine
3969869 3880828 All 1973-1974 454 Engines

1973-1979 Small Block

Left Right Engine
3932461 3932461 All 1973-79 350 Engines

1980-1982

Left Right Engine
3932461 3932461 1980 190 & 230 Horsepower Cast Iron
14037671W 14037672W Tabular Stainless Steel 1980 LG4 (305)
14037671W 14037672W Tabular Stainless Steel All 1981-82

Exhaust Manifold Notes

Cast-iron exhaust manifold casting dates may not be visible when manifold is installed due to date location. Some casting numbers may not be visible when installed due to equipment blocking view. Casting date codes are generally the same as described for engine blocks, except some may not normally carry a calendar-year reference. Those manifolds used with AIR (Air Injection Reactor) emissions equipment are drilled and tapped for AIR tubing. Manifolds generally contain a cast-in “LH” (left-hand) or “RH” (right-hand) designating specific installation location.