I'm looking into getting a new set of pipes for my bike. Right now I'm just running SE II Slip ons and a K&N highflo intake. I'm looking for performance more than anything without a borekit, I have a Zipper's Thundermax Autotune ECM and I can remap to numerous different pipes. I was looking into 2 into 1 exhausts. Does anyone have any input on the 2 into 1's ?