This carbon upper deck is an aftermarket replacement tailored for X4F 27 chassis configurations, intended to give precise control over chassis flex and rear rotation. The split rear arrangement and slim profile ease installation while enabling multiple flex options through the top-deck screw pattern.
CNC-machined from high-grade carbon fibre in the USA, the deck comes with 2 pcs mounting screws for the rear section to permit increased back-end compliance when required. The Multi-Flex approach alters torsional characteristics via different screw placements, affecting traction and steering balance without modifying suspension components.
Practical notes: the narrow deck clears neighbouring components for simple assembly on X4F 27 platforms, and directing flex changes to the rear helps tune rotation and rear bite during corner exit.
For tuners focused on rear-end behaviour on X4F 27 cars, this deck makes it straightforward to alter rear flex and rotation through mounting choices while keeping weight down with a CNC carbon finish.
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