If you're looking to maintain a factory performance in your 2007.5-2018 6.7 Cummins, the Mahle SS45962 Valve Stem Seal Kit is an excellent choice. This OE quality seal kit helps to keep things running smoothly and efficiently, while also preventing oil leaks. Don't settle for anything less than the best - choose the Mahle SS45962 Valve Stem Seal Kit.