Crap. Had the mufflers deleted, sounded great. Deep tone and not too bad drone. Now I had the 3" catless put on yesterday and....... Eeeww. Sounds amazing at idle but at around 3,000 rpm it sounds like a ricer. On the bright side you can hear the turbos 95% of the time. The shop that put them on said one of the O2 bungs hand to be relocated due to the oil pan. And they also said they had to heat them up and make a few tweaks. I plan on putting mufflers back on to rid the rasp. They quoted me 150 and I ended up paying 300 for the install. As for power... Feels faster, but track times will tell.