My wife is wanting me to install an exhaust system on her car that doesn't sound like a pissed off bumble bee. I managed to do that with my elantra by keeping stock exhaust manifold, going to 2 1/4 inch pipe after the second cat, dropping the massive stock resonator, and installing some generic "turbo" muffler. Nice deep sound. Combine that with the howl of my intake and its a really nice sounding 4cyl (IMO of course). I know its not a mazda3 but the 5 uses the same motor (2.3) and the exhaust pulses will/should be the same. Only diffrence really is the length of the piping. What resonator/muffler setups has the mazda3 crowd installed and managed to get a nice deep growl out of this motor? Thanks for any advice in advance.