I also got a JD Jet kit along with cutting the airbox, Twin Air Powerflow, White Bros E2 pipe. I first did the airbox mod, put in the Twin Air Powerflow kit and jetted using the JD Jet kit. I put the hot needle in with the clip in the fifth position, put in the 160 main jet and set the fuel screw to 2 1/4 turns out. Wow! What a difference this was. I just followed JD's directions and recommendations. I also emailed him for some advice and he emailed me back the next day with great information. I just put on the pipe on Friday to gain a little more sound for feedback when I'm riding as I think the stock pipe is too quiet. The WB E2 is just under the 96DB limit so you should be ok. I guess it would just depend on how good your packing is and if a Ranger was to check your bike, how well calibrated his instrument is at the time. I was concerned with this when selecting a pipe as I ride up in the mountains at my in-law's cabin during the spring/summer and don't want to be causing any trouble. We also changed the main jet to a 165, put in a 42 pilot jet, also put in a Zip-Ty fuel screw and turned it down to 1 3/4 turns. Have not had a chance to take it out riding since but my buddy rode it around the block and said that it pulls harder than before installing the pipe and going to the bigger jets.
The carb is a little bit tough to work on but after doing it a second time it was much easier then the first time.