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

This is the Associated Mu body for the RC8B4

Kyosho BRG001TSB Bearing Bearings 5X10X4Mm Flanged Teflon (4)

Height: 42mm

Genuine Traxxas part 9534G

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