Hi guys iv recently got a 172 with a few tweeks like matched inlets ktec stealth exhaust with centre silencer and std cat and ktec map and other bits but my question is can I have a ktec crackle map added on top on there map I already have and do I need a decated exhaust to hear the benefits and would a decat an crackle map make me car loud as I dnt wanna piss the nabours of lol thanx in advance