Not an option for me!
DN - so the Galaxy Gray Si Sedan is your wife's? That was the exact car I was considering before settling on the Speed3. If I ever did decide to keep the Speed3 100%, this exhaust will probably be a must-have.
replaces the 2nd cat, which is not used at all to monitor 02 sensors or anything of the sort. You still maintain your main cat which is the one that is monitored. the 2nd cat is just for sound, I promise.