ARC A11 Split Upper Deck Rear Front Graphite 1.6mm by Factory Pro O-ARCP06S  [FP-O-ARCP06S]

ARC A11 Split Upper Deck

This split upper deck is a replacement hop-up designed for the ARC A11 touring car platform. Made as a graphite 1.6mm plate, it serves as an upper-chassis mounting element located in the rear/front upper deck area of the A11.

Functionally, the part is intended to influence local chassis stiffness and front‑to‑rear balance. Swapping or comparing different upper deck pieces is a common way to fine‑tune how the chassis transfers load between suspension elements and how the car responds during corner entry and mid-corner phases.

Installation requires basic disassembly of the A11 upper deck area to remove the original plate and refit this split unit in the corresponding rear/front positions. Check fastener alignment and ensure the deck sits flush; because this is a graphite plate, small adjustments to mounting torque can change perceived stiffness.

Notes for tuning: use the part to evaluate changes in understeer/oversteer tendencies and to dial chassis feel without altering suspension geometry. Keep setup records so you can compare lap‑by‑lap changes when trying different deck thicknesses or materials.