Oil Restrictor Kit .0625" orifice diameter, 2 per package MO22017

Suit Big Block Chevy Merlin II blocks

MO22017

22017

Screws into existing lifter gallery cleaning plug holes at back of block Oil lifter galley bosses flush with bell housing face Reduces oil flow to upper engine assembly, leaving more oil available for the rod and main bearings Reduces power-robbing windage by reducing the volume of oil passing by the rotating assembly on its return to the pan Do not use with hydraulic lifters