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Wehrli replacement O-ring for the Duramax L5P passenger-side intercooler pipe throttle valve flange seals the flange connection used on WCFab 2020+ L5P passenger-side intercooler pipe kits. Sold individually — the intercooler pipe flange requires two O-rings for a complete seal. It’s offered as a direct replacement component for WCFab kits where the flange sealing surface needs a new O-ring.
Wehrli WCFab 20+ L5P Pass Side I/C Pipe Throttle Valve Flange O-Ring Seal
