Out of stock
Part #
GM LS Rear Oil Galley, Passage Plug, Also Called GM LS Dog Bone Or Barbell

Fits GM Gen III & IV LS Engines 4.8L 5.3L 6.0L 6.2L (Including Vortec Truck Engines)

  • Replaces a worn out or old rear oil passage plug that could be allowing dirty engine oil to bypass the oil filter
  • Machined out of billet aluminum, the OEM GM Part No.12573460 is constructed out of plastic
  • Improved design with a secondary O-ring that’s function is to seal dirty oil from flowing to the engine bearings
  • The shaft diameter of the Moroso passage plug, “Dogbone” or “Barbell” is smaller than the OEM piece, to minimize any flow restriction
  • Supplied O-rings are constructed out of Viton to withstand all types of engine oils, compression cycles and have a high temperature rating
  • Can be easily removed from the engine block once installed with its 4mm threaded hole