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Oil Restrictor Kit (SBC/BBC/.060 orifice diameter); This Oil Restrictor Kit for SBC/BBC engines (.060 orifice diameter) reduces windage & oil flow to upper engine assembly, leaving more oil for rod/main bearing. The Oil delivery holes at the rear cam bearing must be tapped to install.

Oil Restrictor Kit (SBC/BBC/.0625 orifice diameter); This Oil Restrictor Kit for SBC/BBC engines (.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.

Oil Restrictor Kit (Newer GM Gen V/VI Blocks/.0625 orifice diameter); This Oil Restrictor Kit for newer GM-Style blocks (like Gen V/VI) has a .0625 orifice diameter (oil lifter galley bosses flush with bell housing face). It reduces windage & oil flow to upper engine, leaving more oil for rod/main bearing.

Oil Restrictor Kit (Merlin II Blocks/.0625 orifice diameter); 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.

Oil Restrictor Kit (Dart Special High Performance SBC); This Oil Restrictor Kit for Dart SHP SBC reduces windage & oil flow to upper engine assembly, leaving more oil for rod/main bearing.

Oil Restrictors Kit (Ford 302-351W/Dart Iron Eagle Blocks); This Oil Restrictor Kit for Ford 302-351W & Dart Iron Eagle Ford blocks has 4 Cam Bearing Restrictors, 7/16-14 Restrictor, 1/8 NPT Restrictor, & 1/8 NPT Plug. It reduces oil flow to upper engine & leaves more oil for rod/main bearing.

Oil Restrictor Kit (Ford 351 Cleveland Engines); This Oil Restrictor Kit for Ford 351 Cleveland was designed & used by Roush-Fenway Racing. It reduces windage & oil flow to upper engine assembly, leaving more oil for rod/main bearing.