Its loud as hell if you have an aftermarket catback, if you have a stock catback its not bad.
Heres mine with a magnaflow 2.5. I dont think it sounds like ass as someone else said
Others have added a spiralflow muffler after deleting the cat to get rid of the raspy sound. I just got a downpipe with a vibrant cat, it threw the P0420 right afterwards as it would with no cat. Disabling the MIL leaves the code to be thrown, but you wont get a CEL from it. You can also disable your COT with a hi-flo cat.