Tettelokk, for eksosmanifold/rør

Dual Exhaust Using Crossover Exhaust Manifolds

All 1964 to 1972 small blocks used the same exhaust manifolds for dual and single exhaust applications. Only the big block cars used different manifolds. There even wasn't a separate one for the W-31's. The small block exhaust manifold used a cover plate over the crossover outlet for dual exhausts. There is no small block dual exhaust manifold.

The crossover outlet cover placte part is officially called "Cap, Right Exhaust Manifold Cover", part number 386498, used from 1965 to 1971. In 1972, this became part number 382636, as listed in the 1972 assembly manual as "cap - N10 only". N10 was the dual exhaust code option. These parts have been since discontinued by GM.