on a Uly? i can't give you specific #'s on race ecm and race can but having installed a race map into my stock ecm and a hawk muffler on my 2007 Uly, the "seat of the pants" feel is amazingly improved. more than anything else this combo did away with 99% of the leanness and incredibly annoying low speed surging on mine. i would think that a 10% across the board increase in torque and HP is not uncommon.