These are the optional Carbon Reinforced K & KK Parts for the Tamiya XV-01 and XV-01 Pro Chassis Cars.
Tamiya 94935 Carbon Reinforced Slide Wide Roller Stay Mini 4WD GP 2013
Tamiya 54216 60D Reinforced Tire Type B(2pcs ) x 2 packages M Chassis
TAMIYA HOP-UP OPTIONS OP-341 Mini Cooper Reinforced Wheel (w/Carbon)
Freewing A-10 Thunderbolt II V2Jet w/Twin 50mm EDFs- PNP Carbon Fiber Reinforced
Tamiya OP-335 53335 Reinforced One-Piece Spoke Wheels 1/10 Touring x 2 packages
JR HG Carbon RR Brake Stay 1.5mm FC Mini 4WD 25th Anniv / Tamiya / 95125