Part Number: IPR-EGM-501
Improved Racing designed this billet aluminum rear galley plug (commonly known as the "barbell") for Gen III and IV GM LS series engines to improve oil flow and completely eliminate dirty engine oil from bypassing the filter. This part is recommended for replacing the plastic OEM plug in any engine build.
Improved Racing's barbell features a second O-ring that completely seals off the dirty oil from the clean oil, forcing 100% of oil flow through the filter. Sharp corners were avoided and machined as smooth fillets to improve oil flow, while the bullnose tip helps smooth oil flow to the oil filter. The shaft diameter is smaller than the OEM plastic barbell to minimize flow restriction. A threaded hole was added so that the barbell can be easily removed with any M4x0.7 screw.
All General Motors Gen III and IV LS series Engines (including Vortec truck engines).
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