It has always been my personal opinion that unless you own an m3 your car shouldnt say m3 on it... Mods dont matter, you may have an awesome 328... it may beat an m3, but its still just that.. a modified 328. I had a 360whp 02 WRX that would walk STi's and it never once crossed my mind to throw a pink STi badge on my car ha. I now have a 350z and im not about to call it a skyline or fairlady. I'd take more pride in my modified 328 for what it is, rather than trying to "trick" people into thinking i own an m3.