They are a direct upgrade for these Arrma 4S BLX platforms

Traxxas 9545T - Aluminum Steering Servo Saver Post

Fits the Traxxas Hoss 4x4 VXL

TP Power TP4060 3Y 1750KV Brushless Motor 8MM SHAFT

First Off-Road Toyo Tire from Pro-Line

Kyosho MZN-W01M 3D Rear Wing for McLaren 720S (Mid Mount) Micro/Mini Servo They are a direct upgradeKyosho MZN W01M 3D Rear Wing for McLaren 720S (Mid Mount) The Kyosho MZN W01M is a genuine 3D rear wing designed for the McLaren 720S, using a mid mount configuration. Manufactured to Kyosho's original specifications, it restores factory downforce and aerodynamic styling. A direct fit replacement to refresh your McLaren 720S's looks or replace a damaged wing. Genuine Kyosho part MZN W01M 3D rear wing Mount type: Mid Fits the McLaren 720S