Dont be a tough guy and refuse to pop your hood. Chances are if you are obeying the law for the most part, this situation wont even come about, but if it does, dont be a punk, itll only show you have something to hide and don't think they wont find a way to get to the bottom of things. its like a cop smelling alcohol on your breath, seeing a cooler on the passenger seat, then you refusing to open it...don't give them reason to be more suspicious or act like you know more about their job than they do, itll just piss them off. especially if you did something wrong, you know you did something wrong and so does the officer, its the reason they pulled you over, so dont beat around the bush. From how you sound, it seems like you legitimately dont want to play the illegal game, so as long as you stay on that path, you shouldnt have anything to hide. Plus, with the stuff you said you want to do and like the guy above said, get a heat shield and they shouldnt be able to tell its very far from stock considering the things you want to do. S2 w/o toys passed the sniffer with someone, so yes get the reflash so you dont throw codes. Bigger turbo might have emission problems, I dont think anyones tested that one yet. I hear people with BOVs around, but it is true that they are not legal and if a cop hears one, there is your probable cause to pop your hood cause its not street legal and the sound is usually quite audible, no need now for a warrant. Some cops don't care, so long as you follow the advice in jeffs public service announcement, but you just never know and there could be just as many cops out really wanting to crack down on illegal cars. This has been a very big concern for me as well, Ive never gotten a moving violation and really don't want to get a stupid fix-it ticket either, or fine for that matter.