Keep us posted. I just had a similar problem with it shuttering at high rpms but I'm in an 04 VIII. It turned out simply to be my spark plug gap and heat range was all wrong, duh.

 

just brought the car to mitsubitshi the car was moded before -_- warrenty voided sucks... car still at mitsubitshi and i really dont know what to do now...i dont know how the lemon law works but i want to return it back to the dealership i gto tit from and get all my money back if i dont get this car fixed for free..they are looking into the car right now and giving me a call back hopfully