everytime this comes up, i ask "why?"
why do you want the loudest pipe... it just pisses people off, people already think 2 strokes are bad, and if you have neighbors they will hate you
if you want something loud, go find a 1" piece of pipe and remove your silencer. run the straight pipe from the header back
you wont be able to hear anything after 2 minutes riding, but be glad it sounds loud and cool
and then when you finally realize power and fun are not about being "loud" put your muffler back on