I have dumped 40 series flows on my car....it sounds absolutely rude when its idling and when its up in the rpms but you dont get the tone you get with tails. Sounds like a truck kinda. I think i may be switchin to side exit this summer. I dont have ANY drone however and people who say that dumpin the exhaust makes em drone more dont know what they are talkin about...i had way more drone with the tails on there. good luck man