I went 83mm cause 73mm wasnt in stock lol I was getting tuned that weekend. I figured what am i gonna do flow too much air? Prob overkill, i noticed the throttle response is a bit slower sometimes. I bought a 3.5 map sensor because stock sensor only logs 22.5psi and what if i hit boost spike? Didnt want to run into boost cut issues etc To be honest i was hoping to run more boost like 24+ but i think with my tmic, the vf52 is just blowing hot air and working overtime. Although i might experiment with some kinda spray for my tmic to cool it down. Maybe co2 etc. It doesnt bother me that much unless its 75degrees+ which isnt very often here in central ny. A part of me wishes i had a fmic but i dont think its necessary unless you live in a hot climate, i would rather spend $300 on a nice co2 kit. But i knew from the start i wasnt gonna upgrade my turbo, i like fast spool, and being able to go back to stock in a weekend if ever needed.