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

Stiffen your Mugen Seiki with a 7075 main chassis

RC racers looking to tighten up handling will appreciate the Mugen Seiki MRX4/MRX4-R 6mm 7075 aluminum main chassis by 3Racing MRX4-12/TI. This precision-engineered plate is intended to increase durability and provide a more predictable platform for tuning.

Built to handle racing loads

Made from 7075 aluminum, the 6mm thickness offers a robust backbone that resists flex during hard cornering and heavy landings. That added stiffness helps keep suspension geometry consistent so drivers can trust setup changes on race day.

Direct fit for MRX4 platforms

The main chassis is produced to suit the Mugen Seiki MRX4 and MRX4-R line, delivering a close fit and straightforward installation. It is a common upgrade for owners replacing a worn original or pursuing a firmer baseline chassis.

Why 7075 works well

7075 alloy is chosen for its high strength-to-weight characteristics, which balance rigidity with manageable mass. Using this material, 3Racing targets better torsional control without adding unnecessary weight.