3Racing MRX4-12/TI 6mm 7075 Main Chassis Upgrade for Mugen Seiki MRX4/MRX4-R  [MRX4-12/TI]

Fit a precision 7075 chassis to sharpen handling

The Mugen Seiki MRX4/MRX4-R 6mm 7075 aluminum main chassis by 3Racing MRX4-12/TI is a practical upgrade for racers chasing cleaner handling. This precision-engineered plate aims to give a firmer baseline for setup work.

Strength where it matters

Using 7075 aluminum and a 6mm thickness, the chassis is built to resist flex during aggressive driving. That extra stiffness keeps suspension geometry more consistent through corners and over bumps.

Simple swap for MRX4 owners

Specifically produced for Mugen Seiki MRX4 and MRX4-R models, the chassis offers a straightforward replacement path from the stock plate. It is commonly chosen by tuners wanting a more stable platform.

Performance minded alloy choice

7075 is selected for a strong strength-to-weight ratio, which helps increase torsional stiffness without a large weight penalty. This material choice supports sharper handling while retaining everyday usability.