I know exhaust has been covered countless times, but I just wanted some input on what I should do about my catylitic converter. My cat is broken, and I'm either going to remove it, put a highflow cat in, or just straight up replace the cat. I wanted to know if anyone knows how loud my exhaust would be without a cat, or with a high flow cat. Is it too loud or does it sound bad? I have a 40 series flowmaster SISO with 3" pipe. Any comments would be appreciated.

 

The cat or lack of a cat should not affect the sound of your exhaust.

Will

 

A highflow cat or no cat makes a difference in sound just listen to my SI/SO 3" ..
http://www.youtube.com/watch?v=0POiKyO8QH8

 

Would that sound about the same if there was no cat on you think? Also, a few people on here have suggested the Fastman sim, is that the way to go?