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

• Machined billet aluminum oil passage plug (AKA "barbell") for use with GM Gen III/IV LS engines
• Replaces O.E.M. plastic plug that could allow oil to bypass filter when worn
• Secondary O-ring added to prevent dirty oil from flowing to engine bearings
• Smaller diameter shaft with rounded edges for improved oil flow
• 4mm threaded hole to help with ease of removal