Mugen Seiki MRX4 3Racing MRX4-21/GO Performance Brake Disc  [MRX4-21/GO]

Refine your MRX4 braking response

The Mugen Seiki MRX4 Brake Disc by 3Racing MRX4-21/GO is engineered to tighten up braking feel on the MRX4 chassis. With attention to machining and material selection, it reduces inconsistent bite and helps with lap to lap repeatability.

Designed for track endurance

This disc is matched to Mugen Seiki MRX4 and MRX4-R layouts and offers improved stopping power while standing up to repeated braking cycles. The focus is on steady performance rather than flashy claims.

Fast swap for minimal downtime

Installation is straightforward for hobbyists and race crews. The 3Racing unit aligns cleanly with existing hardware so you can replace the disc quickly between sessions.