The GPM Alloy Rear Knuckle Arm Holder MZA031R-0406 is engineered for Kyosho Mini-Z AWD installations, delivering a -0.4mm toe-out and a 0.6mm thickness to stabilise rear alignment. Constructed from high quality alloy for improved structural rigidity versus plastic originals, it is aimed at hobbyists seeking repeatable setup and reduced deformation under load.