Engine block Oil Restrictor Kits, BMP/World BBC Aluminum Blocks, World Products Merlin II, III cast iron blocks. .060″, Mounts flush with the bell housing face, Two per kit. (one long and one short). Mounts flush with bell housing face. Two per kit
Reduces oil flow to upper engine assembly, leaving more oil available for the rod and main bearings also eliminating additional oil volume being drained down on top of the rotating assembly.
Note: not for use with hydraulic lifters