My baby seemz to have lost her bite when I up shift . What I'm trying to say iz that she use to kick to the side like a phuckn wild bronco when excelerating hard from 1st up to 5th gear . I only have 11,000 mi on her ,I just notice it recently and the only mod that I've done to her before taking notice was going up two teeth on the rear and putting on a yellow box,everything else is stock besides the apperance. Oh'yeah after 5000 mi I changed the plugs and filter and the oil every 1,100 mi. What da . Has anyone else experience this problem and what did you do to resuscitate ?