This plenum extension is made to fit the Gen2 plenums. The extension is additional 30cc of volume and will add 52mm length to you existing main plenum. They are also stackable as well. It will come with orings needed for the installation. CNC machined from 6061 T6 and blk anodized right here in USA.
Note- These extensions are designed to work with the main plenum I offer. They will not fit/work without it
