Don't even think about doing that if you live in O.C.
You will be pulled over, no doubt about it.
Before my turbo I had my resonator taken off and no cat but I did have a muffler, cop heard me 3 blocks away and followed the sound to my car. That is how loud it is without resonator and straight pipe.
I got a straight pipe w/ the end section of a greddy axle-back (basically just a tip) and its freaking LOUD! I've had it for about a year now and I havent been pulled over for it :thumbup:
Just dont drive in Newport Beach area... they will pull you over and give you a ticket for any non-stock sound coming from the car. Ive been pulled over 3 times in my gsxr-600 telefonica for my yoshi exhaust. Its not even freaking loud... NB area is anal about sound.
I got full 3", straight piping, no resonators. I haven't been pulled over yet, but i'm sure I will if I come in contact with a pig. The thing with exhaust is that even if your not on the throttle its loud. 115 db I think.