Okay. You do know you CAN NOT rotate your tires! The car has staggered tires, the back tires are larger then the fronts. If you have had your tires rotated I think I know what your problem is. I would get them balanced and see if that helps.

mlc

 

The tires should be directional so they are only desinged to roll in one direction. If you have had the tires rotated check and see that the tires are in the correct position.

mlc

 

what's the point?

 

Yeah definitely cannot rotate with these tires. They are directional unless you switched the tires out.
Get your wheels and tires balanced and check tire pressure. And if you do have stock tires make sure to put them back on correctly with the directionals going the correct way.

 

balance, but check pressures

 

so I cant due right to left rotate? I also forgot to mention Im using Kumho tires, not the stock tires.

 

Actually, it could be simple hardness of the tire. I was running stock 140s up front, and 3xx in the back and i couldn't keep a lane at over 100. Now that I have the 3xx's in the front and back I can easily max the car out like i used to. Make sure you have the same harness tire in front and back.

 

what's the point?

 

check your brakes also rotors could possibly be semi warped get your tires balanced and get an allignment all problems will be solved