Originally Posted by XwChriswX

If you were to keep your stock cats, and get the 18" Resonated SS CBE from FI, you'll have a deeper tone that you can hear all throughout the powerband, and when you Do get on it, she'll roar to life for you.

Some other brands to look at would be ARK, Akrapovic, HKS, Amuse... Each have their pros/cons but FI seems to be the best when it comes to most pro's least cons...