I would have to disagree with your stage definitions, not to say "NO WAY YOUR DEFINITIONS ARE CRAP!" But rather to say well what do you think of how I put it
STAGE 0: Nothing or panel/cone filter
STAGE 1: At least Stg 1 Tune, plus Stg 0
STAGE 2: Stg 2 Tune + DP
STAGE 2.5: Tune + TBE + Headers/UP + Panel/Cone filter
STAGE 3+: Start into intercoolers and upgraded turbos
I just think it makes more sense because it goes more into what the manufacturers say what a stage 2 is...tune and DP...no intercoolers or anything...Just a thought
Zac