After having my headers installed wednesday, with Taylor wires and ngk plugs I didn't want to sound to optimistic on the performance. I took the car out for a 2 hour drive letting the computer dial in the proper adjustments. After an hour of misc. wot and throttle stomps I got on the freeway, hit it hard...looked at the hud just as I was going to shift into 4th gear around 91 mph, low and behold the rear tires start spinning. Temp was 48 degrees tires completely warmed and a semi-smooth asphalt road. I know this is not science, but it sure seems faster, I even tried it again to verify it was not just a coincidence.