its weird how you can get such a high number on tq and hp with the stock muffler. but man great numbers BTW, I have the same setup and only making 212whp and 175tw that is with the following mods.
RBC
injen
BCRH
2.25 midpipe
twinloop muffler
650cc
stock internal k24a1/k20a2
running k20a2 crank pulley ( does it really make a different or should i go with the stock k24 Crank pulley?)