This plenum extension is designed for the Gen2 plenums and is drilled and tapped for a 1/8 bspp gauge. It will come with orings, shims and a 1/8 bspp gauge (250bar). The volume is 22cc and itll add additional 52mm of length to your existing main plenum. They are cnc machined from 6061 T6 and blk anodized right here in USA.
Note- These extensions are designed to fit the main plenum I offer. They will not work without it
