Mahle LS camshaft retainer.
This plate not only holds the cam in position but also provides a seal for the lifter oil galleries and should be replaced when changing the cam over.
Using the old plate can result in loss of oil pressure if it the seal fails.
Regardless of what application you are trying to seal, you can count on MAHLE Aftermarket to do the research and testing to determine and provide the optimum material and technology for that specific application. No other gasket distributor offers the Application-Engineered approach to sealing an engine. A variety of different gasket materials ensure an engine gets the optimal seal. All gaskets are not created equal - MAHLE Original® gaskets prove it every day.