You did a great service to speed junky Z community. I know i will get them eventually. I know the focus for these is drag racing. But, in respects to road racing, will they make a big difference? I know they will make you accel out of turns quicker. But, is the increase in acceleration more noticable at slower speeds (ie. going from a stop on a drag strip) or will the difference be felt throughout all the gears? and will it have any negative effects on road racing?