System 1 Chev Billet Block Adapter -12 Male Gen IV & Earlier, Black (SY228-90556-12B)

Designed to facilitate mounting a remote oil filter on most small block or big block Chevy engine (except Mark IV or later blocks with shallow mounting pad), System 1's highly acclaimed adapter seals at the filter mounting pad where the cast filter bypass adapter was. Comes with choice of AN-10 or AN-12 fittings and a pair of 5/16-18 O-ringed 12-point mounting bolts, Black anodized only.