Are your up-pipes leaking in your L5P Duramax? Replace your gaskets with the better than stock PPE Stainless Steel Up-Pipe Gasket Set for your L5P Duramax. These gaskets are constructed from milti-layered 301 stainless steel and feature a rolled edge that creates a tight seal between the manifold and turbo inlet. These gaskets perform better than stock under extreme changes in temperature so you can rest assured you have a leak free seal. These gaskets work with stock up-pipes and aftermarket up-pipes. Sold as a complete set of four.