Ok, question for you techs out there. Got the GT-S with a CAI. I think this started happening after it was installed but I'm not sure if i maybe just didn't notice it before. At 80-mph the car seems to shake a bit and I can feel it in the steering wheel. As soon as I hit 90 and drop it back down to 80, no problem : Smooth as can be. . . what the hell is this about? Please let me know your imput. Thanks.