This Oil Restrictor Kit for Merlin II Blocks (.0625 orifice diameter) screws into lifter galley cleaning plug holes at the back of the block. It reduces windage & oil flow to upper engine assembly, leaving more oil for rod/main bearing.
; 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
  • Merlin II Blocks
  • .0625 orifice diameter
  • Screws into lifter galley cleaning plug holes at back of block
  • Lowers oil flow to upper engine assembly, leaving more oil for rod/main bearings
  • Reduces windage
  • Don't use w/ hydraulic lifters.

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