Hi all I finally got my 14cc plenum installed i received from C88 Machining for $52 bucks. Degassed the 250Z 22 first off then removed the stock. Un-installed reg gauge from rifle and set aside. Reinstalled rifle stock. Then lubricated the plenum body and oring and screwed the unit in place where the gauge was removed with proper oring in place where it threads in and only hand tight. Then Installed the 8mm dowdy washer on gauge threads then installed and slightly tightened. Tightened up degassing screw and cocked the rifle and filled and checked for leaks and 24 hour leak test is started til tomorrow. Testing to follow on next warm day. Pics below may not be in order but they are all there. It's one of the easiest repairs or upgrade I have ever done. No holes to drill or widen. Easy peazy!
