Cattman y pipe??all opinions valued

Does anyone know if i will have any problems with a all stock exhaust and cattman y pipe when emissions testing roles around?? Also will there be any bees in a coffee can noise from the y pipe? A RICE SOUND IS NOT ACCEPTABLE! I also plan on a place racing cai to complement the y pipe. What sound will this make??
All advice is greatly appreciated.
THANKS

I have a Warpspeed y pipe just installed, the sound is just slightly more, most people wouldnt notice, and before the emissions testing, be sure to have your engine at working temp ( not cold), as the precats on the original y pipe are eliminated, you have to get the main cat hot, and you wont have any trouble

finally someone to offer some advice. it is much appreciated