soo i just finished downloading all the maps for 2007 Sti, but i just noticed that the instruction say that i must have a STOCK Intake system. which i have a short ram nuespeed pipe/blitz uras filter. i was wondering what the solution for this is? has anyone else done this? does it matter? i am i able to safely just install acn91 map and have everything run fine? my friend has been running this intake for a while and had no problem himself with it, so i was wondering if there was a way that i would test for this problem. i know the suggestions out there would be that i protune it, but i dont see the benefit of protuning just an aftermarket intake. if someone could clarify this for me, but telling me if anyone else here is just running an aftermarket intake without problems, if also its a common practice that everyone does it. i do feel earlier spool on my turbo, and i am aware that it maybe running lean. soo if i could get some input.. that be great, thanks.

 

I had a intake on acn91 Stage 1 tune. Then got a full turboback and now running 2. You'll be fine.