would getting a high flow cat give me annyy preformance w/ stock exaust? and will it sound nicer?

 

oh and which high flow cat is good and for a good price how much are they usually?

 

Many believe Crawford's High-flow Cats are the best: Link

 

Like 3whp if that. It takes a lot of breathing mods to achieve any noticeable gains, do yourself a favor and leave your stock exhaust alone. Yeah the sound is awesome, a tad louder than stock. I've posted vids of mine before.