OVERVIEW Upgrade your Traxxas 1/10 Maxx 4S with our Alloy Conversion Hop-Up Kit! The kit will completely transform your stock Maxx 4S by replacing molded plastic parts with colorful, attention-getting aluminum alloy! The kit includes alloy front and rear lower arms, alloy front and rear upper arms, alloy front caster blocks, alloy front knuckles, alloy rear hub carriers, and an alloy steering rack. The Alloy Conversion Hop-Up Kit is available blue or red finishes. Item# C30346BLUE Barcode: 91789039174.