This plenum extension is designed for the Gen2 plenums and is drilled and tapped for a 1/8 bspp gauge. You will need to provide your own gauge. It will come with all the necessary orings/washer seal. The volume is 22cc and itll add additional 52mm of length to your existing main plenum. It is also slightly over clocked so you would need to align it prior to pressurizing. They are cnc machined from 6061 T6 and blk anodized right here in USA.
