This Billet Aluminum LML Duramax Aluminum Compressor Inlet Flange for an OEM style Garrett VGT Turbo from WCFab is CNC machined from 6061-T6 billet aluminum in DeKalb, IL USA. Designed to be used with the OEM GM LML Turbo inlet worm gear style clamp, this flange comes ready to be welded up by DIY fabricators who are building their own custom turbo inlets, and air intake setups for these engines. O-ring seal at face of turbo sold separately, see part WCF203-25.