If you run an XB4 and want cleaner suspension behaviour, the XRAY 368042 Composite Shock Bushing & Shim Set made for the XB4 aluminum shock cap is a practical upgrade. It aims to reduce wear and make small tuning steps easier to repeat.
The supplied bushings and shims are manufactured from quality composite, built to resist track wear. That stability in the mounting points helps preserve consistent shock action during runs.
This kit includes two bushings and two shims so you can change the spacing at the shock cap with precision. Adjustments are straightforward and help tune either more grip or sharper turn-in depending on your setup goals.
Whether replacing tired parts or stepping up your setup, the set is useful for keeping the XB4 performing reliably. Regular replacement of these interfaces can prevent unpredictable handling.
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