[dparm]

The Akrapovic Evo is a very deep boomy sound, maybe even obnoxiously so (there's a reason so many end up for sale on the classifieds...they sound gets old really fast).

The STI sound is something you will never replicate -- the unequal-length headers mean the exhaust gas pulses line up in a strange way and give it the unique sound.

Deleting your cats will make it raspy and tinny.