If I understand these plug and play units correctly, some can only add fuel, not remove from stock. Is this the case with a cobra unit? For this reason, I would be careful because you don't know what a given pipe needs until you put it on an EGA. With a full race pipe, the Buell is richer in some areas and lean in others, and requires full adustability that you can only get with a PC. I think units like the cobra really only smooth out the fuel curve in spots made lean by epa. Normally, full throttle carburetion is not lean. LaMonster is on the right track by dynoing the pipe first, and hopefully there will be an EGA availale at the time. As long as A/F is optimal, the best HP is being made.