I just got a letter from the epa for exhaust noise, went to a epa approved tester and it was hassle free. took about 10 mins. they rev'ed the car to 5000rpm and it recorded a 88db reading, they cleared it and all I need to do is sent a letter to the epa.
although this isn't what you got dicked for it might be usefull info.
personally if I had the gofastbits stealth bov on I'd leave it on as it plumb back and you only change it when your at the track