Nexx Racing's Optional/Replacement: BUMPER andBODY POOST KIT. NX-017 used with the use of Lexan "Pan Cars" (Square front shape) Includes 2 body post...NX-018 used on the "GT" (Round front shape) includes body post, High Strength, Quality and Style. Fits: most Mini-Z and Competition Aluminum Chassis at a great price!