I've searched all over and I'm trying to find a dyno chart of an ITR with smsps header cat and catback as an only mod. What will the power gain be from stock to a set up of smsp header, cat, catback, and a comptech icebox? Estimations?

 

your engine will probably dyno at ~190whp- 200whp.

that is, assuming you have an ITR engine.

 

;-) ya i have the euro ITR engine. I dynoed my car today stock at 193hp 164whp at 90 degrees!!! I was really happy with the results for the temperature it was in! Tomorrow I'm bolting up all these parts and dynoing.