I have a 2009 lnf with Injen cai, Injen pressure piping, 3in catless dp, zzp cai and 3 bar maps. I am running a custom tune at 24psi of boost. The car ran great clear up until a few days ago. Then it seemed like all power went away, and it doesn't pull half as hard. But everything else seems normal. Temp runs at about 198 and I'm not throwing any cels. Still peaking at 24 psi of boost and afr is staying normal. Clutch doesn't feel like its slipping either. Any ideas of anything to look at/ check would be great.

 

Sometimes LNFs foul the spark plugs. This happens if you start the car and don't warm it up fully a few times. Maybe check the spark plugs or replace them if they are old.