GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE) Aazon.co: G Genuine Parts 12595923 Rear Crankshaft Oil Seal Housing... GM Genuine Parts Engine Crankshaft Seal Housings are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors Rear Main Seal by CORTECO - 82036307 Bar's Rear Main Seal Engine Housing Crankshaft Seal GM regularly updates production and service part designs to integrate new materials and technologies Jeremywell 60 Roller Chain 100 Feet with 10 Connecting Links ; Pitch Size · 0.750 Inch ; Length · 100 Feet Roll ; Average Tensile Strength · 8500 lbs ; Country, USA Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).