Kyosho MR-03 Narrow Upper Arm for Mini-Z MR3-19/BU by 3Racing  [MR3-19/BU]

Mini-Z MR-03 narrow front tuning option

The MR3-19/BU narrow front upper arm is an aftermarket link aimed at Mini-Z MR-03 owners who want a reduced front track for different steering behaviour. It is an RC suspension component that affects handling without any suggestion of full-size application.

This part is compatible with MR-03 chassis that accept the narrow upper link shape; when the mount points and spacing match it can replace the stock upper link or be used as an upgrade for specific setup changes.

Fitting is user level: remove the existing upper arm, inspect ball studs and bushings, install the MR3-19/BU in the same orientation, then confirm steering travel and toe. You may need to tweak servo endpoints or anti-roll settings after installation.

Setup note: the narrower link alters front-end geometry and steering responsiveness, so use it when tuning for quicker turn-in, different steering centre feel, or when tailoring the car to a particular surface or track layout.