14cc plenum machined to for the Barra 250z. Plenum is a plug in play with no modifications needed. You will use your factory reg gauge and relocate it on the bottom of the plenum with the included m8 dowty seal. With this add on you can expect some gains in fps which will vary depending on the projectile and tune. CNC machined from 6061 and blk anodized. Made in USA
