Ya sounds awsome. Yes my check engine light on from cat rrmoval but also im only running one 02 sensor as well and in fl we dont have emissions. But u can get ur cat removed and get fouler kit for rear 02 and it eliminates the check engine lightThat's some nice sound . I like it alot. Question though, is running with the Cat removed causing the "check engine" light to come on? And, how are you able to get thru emissions without the cat installed?