For GM vehicle owners doing engine work, this genuine GM valve stem oil seal set is the real deal. Part number 12664250 is the exact OEM specification that came with your vehicle originally, not some aftermarket copy that might not fit or perform as well. These seals are crucial for preventing oil from leaking down into the combustion chambers while allowing just the right amount of lubrication for the valve stems. If you're experiencing blue smoke from the exhaust, oil consumption issues, or doing a valve job rebuild, replacing these seals is often necessary. GM engineers specifically designed and tested these for your Chevrolet, Buick, GMC, or Cadillac vehicle, so you know they'll hold up to the heat and pressure of engine operation. The quality is what you'd expect from genuine GM parts - they regularly update their designs with new materials and technologies too. Just be aware there's a California Prop 65 warning about cancer and reproductive harm, which is pretty standard for automotive parts. If you're doing your own engine work or having a shop handle it, using these genuine seals ensures you're getting the exact same quality that left the factory.
Free 30-day returns 
Free 30-day returns
