Coming from Serpent and made for the Project 4X are the double vertical top deck and top-deck stiffeners. First up, the new top deck is the base for all the new flex options. It consists of two equal shaped vertical oriented 2.5mm carbon fibre plates. The plates are connected to the front and rear suspension with a machined aluminium adaptor plate. Unlike flat top decks, the vertical oriented double top deck still allows a lot of linear torsional flex, but basically eliminates any longitudinal tweaking and reduces torsional tweak drastically. It can be run in addition to the kit aluminium center stiffener. The H-shaped stiffener plate can be removed when the topdeck is used to create more flex in the front and rear section of the car.
Next up are the top deck stiffeners.To stiffen up the assembly further, there are two top deck stiffeners available which connect the vertical double top deck to the center stiffener/motor mount assembly. Both can be used individually, to tune front and rear flex individually.
With these optionals the 4X can be adapted to any track condition from high to low bite, carpet, asphalt, hot and cold temperature. Also with the top deck the Project 4X car is almost immune to tweak due to crashes.