The XRAY 342043 Aluminum Upper Arm Holder Left is built for the RX8.3 chassis to bring crisper steering and improved turn control. Fabricated from Swiss 7075 T6 aluminum, this component is designed for strength under race loads while keeping weight low.
This holder fits XRAY's updated aluminum bulkheads and uses a single screw on the front upper clamp plus two screws on the radio plate to enable the Multi-Flex system. Tweaking those radio plate screws alters chassis flex and lets you dial in a preferred steering feel.
By allowing the upper arms to sit further back, the unit raises caster angle for improved cornering pace and stability. That adjustment is useful when you need more front-end bite or steadier exits on technical tracks.
For racers wanting a precise, tunable steering upgrade, the XRAY 342043 Aluminum Upper Arm Holder Left is a practical choice for RX8.3 setups.
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