XRAY X4 Split Front Graphite Upper Deck. This optional front upper deck is designed specifically for asphalt tracks. The top deck features milled holes for special tweak-free top deck screws. Being two pieces, this will allow for more flex options and can easily be adjusted between the front and rear. Package includes one front upper deck.
Only one rear screw is used. This allows maximum flex and provides maximum steering. However, the car is less stable on-power.
Both screws are used. This setting gives reduced flex, rotation is decreased. This setting provides maximum stability and makes the car easier to drive.