Hello all I have a question that I cant find the exact answer I am looking for. I have a 2007 sti currently modded to 345whp. Im looking to take it to the next power level with e85 hoping to reach 450whp. Currently I am running a 73mm kstech and have already gone through the state ref process here in Ca and dont want to again. My goal is to make the engine bay as stock looking as possible and why I run a tmic with a blouch 2.5xtr 10cm w/2.5 inlet. I need to ditch the intake because of not being CARB approved. I am thinking of running the stock airbox with a knn drop in filter. Do you guys think the stock airbox will support the power I am looking for? I have read posts of folks saying it will support 400+ but i have not seen the proof so lets talk about it. I ordered a knn typhoon and compared the filter area to the stock filter and my kstech filter which i dont see a significant difference in filter area so im going to return it. Also I am aware the MAF will max out and why im going speed density so it will not be an issue anymore. Thoughts and suggestions are welcomed thanks.