you can get the MREV2 if you want, but it was designed to have optimum gains with the REV UP motor.

i spoke to Tony regarding using the MREV2 on my FX which is a non rev-up and he said that you will see less gains than what the dynos show, and it might not be worth it for the price. the MREV2 costs $445 with a core rebate of $130 i think...might be a bit less.