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Oil Restrictor Kit; Do Not Use w/Hydraulic Lifters; Screws Into Existing Lifter Gallery Cleaning Plug Holes At Back Of Block; 1/16 in. Orifice Dia.; 2 Per Pack;
• 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
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