Owners of XB4 vehicles can upgrade durability with the XRAY 368162 Hardened Shock Shafts. These 40mm shafts are offered as a twin pack and are manufactured from hardened steel to stand up to repeated impacts and high load cycles. They are intended to keep shock action predictable during race weekends.
A careful surface finishing step produces a smooth shaft that reduces binding inside the shock body. Lower friction means more consistent damping and less wear on seals and moving parts. That stability is useful for tuning and repeatable lap times.
These shafts are sized to match XB4 shock specifications, allowing easy swap-in replacement without machining. Sturdy construction improves suspension longevity and helps maintain control under heavier throttle and rough track sections.
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