How many guys run no cats on their 360s I'm thinking aftermarket headers, no cats and tumi exhaust. Not sure if it will be too loud or not. Any sound links or advice.
It will be louder than you would expect. You will need a valve controller that can stay closed if you are ever in a situation were you can't shatter windows everywhere you go. If you do the headers, maybe stay stock cat or high flow and see how you like it. If you think that's tame, then go full open.
It will be loud and drone. My biggest complaint about my setup (Headers, Cats & Capristo Level 3) is drone. Under 4k rpms, and especially in 6th gear at highway speeds it drones terribly. The overall loudness when you're on it will be loud, but not something that will bother you if you're ok with louder than stock.
I've run headers, hyperflow, and tubi on my 360. I found it too loud and, worse, it didn't sound particularly good at anything but wide open throttle. I swapped in kinetix 200 cell cats and it sounds wonderful at part throttle. I'd bring ear plugs if I had to be in it for longer than 45 minute or so though. Brief video here
An alternative to think about is sport cats -- 100 cell or so. Still loud but not insane. Also no CEL. Have Novitec sport cats on my 458. You can actually feel that it is a bit quicker.
I always leave the primary stock catalytic converters in my vehicles. Exhaust notes are usually raspy without cats, plus CEL, plus smell sometimes. I have not had good luck with aftermarket catalytic converters in the past either on other cars. Agency Power headers + stock cats + S-Line exhaust is perfect
I will post a video of what I decide on. Thanks for all the tips. I can't leave the stock ugly cats on This engine bay is getting all polished and carboned out lol.
I had no cats on my Euro spec (no pre cats) 360 with Tubi. Wasn't too loud but droned and had CEL. Fitted Hyperflow cats, fixed drone and CEL and a little quieter.
