Good to hear that you've already done your homework on the autotune and your choice is a good one on the D&D also. As for the Thunderheader, while also agood pipe, I have seen a dyno sheet where this pipe was used, and it had a flat spot in the torque curve where it dipped for a moment around 2500rpm. Ithen sawthe same bike dyno'd again with a switch to a D&D and the curve was perfect and the dip had disappeared. Both pipes produce good numbers, but the D&D addressed the torque and horsepower without challenge. Just some info for you.

Later!

 

Glideman,
do you have a pic of the whole bike/pipes? thx