I believe the afm is like 3 1/4 " or sumthing. Plus I've gutted the afm. No 1" bar across the middle. Most people run pfc with an afm Which still has an inch of thick plastic to create turbulance etc. I duno. Look ideally Wed all have no pod filter and almost zero exhaust for altimate flow. Lol. If I can get 500rpm off with actuator fiddling etc. This will be an insane setup. 600hp full boost at 3500. That's like hard to even comprehend. Lol