Adam is running a 1.5mm aluminum chassis version of the X4'26 here in Daun. Adam's car is fitted with H lower arms for more cornering speed, and optional aluminium spring retainers for a more consistent damping feel. Adam's car is close to kit spec, and has been fine tuned for these medium grip, ETS carpet, technical carpet track conditions. Adam prefers the CFF upper arms for the maximum amount of mechanical grip.