18cc side mount plenum designed for the Zelos. With this added you can expect increase of 20-40fps depending on caliber, tune, and projectile. It’ll come with the necessary washer seal, shims, and orings needed for the installation (You will need to supply your own 1/8 bsp gauge). They are cnc machined from 6061 T6 and blk anodized. Made in USA
Note: YOU will need to supply your own 1/8 bsp gauge
