Peterson Fluid Systems oil inlet adapter (-12 port x -12 x 3.250") is an aluminum front-of-block fitting that matches a -12AN inlet to a -12AN outlet and offers a 3.250-inch length. It is made to position oil input over the water pump on small-block Chevy engines, providing a prepared mounting length for front-mounted oil feed configurations.
Peterson Fluid Systems Oil Inlet Fitting -12AN Portx - 12 x 3.250