seems bullet proof on the 90 tune(lvl 4),and was running the 110(LVL 5) for quite a while and worked great for a DD, have had it on the 135(lvl6) for about a week now, is alot of fun, tons of low end grunt and some nice smoke if that's what your looking for, but whatch those 4-5 shifts, i put it on the 165(lvl 7) for an hour one day last week, it was a bit much for a daily driver, and actually less smoke than 135 tune, but i do plan on doing a trans in the future, but i take the 4-5's easy and watch the 5-4 passing downshift it will limp your trans if your not careful.
I ran my PPE on 160(lvl4) tune daily and 225(lvl5) on occasssion on my 02 and limped it once in 4 months and was still all good when i sold it, and as far as i know the guy is still running it on the 130-160 daily and he has owned it for about 10-11 months now, but this quadzilla stealth on the 135 tune feels much more potent then the 160 ppe tune maybe even nearing the 225 PPE tune.
oh and stock airbox,no boost valve, and just straight piped(no muffler)3.5" "factory" exhaust