Wehrli - WCF203-25Wehrli Custom Fab O-Ring Seal, WCFab VGT TURBO INLET LLY, LBZ, LMM, LMLReplacement O-Ring for Duramax VGT Turbo inlet.Used on the following WCFab Kits: Legacy S400/Stock twin kits 2004.5-2016 models, Stage 2 intake kits for 2004.5-2016...