Mini 4WD balance block 9g M4WD-39/BL by 3Racing  [M4WD-39/BL]

Cuboid mass damper M4WD-39/BL for tight Mini 4WD setups

The M4WD-39/BL is a compact cuboid mass damper finished in black and specified at 9 grams. It is an aftermarket mass block intended for use with standard Mini 4WD bodies and frames where small, precise weight additions are required. No mounting hardware is supplied, so attachment depends on your chassis layout and chosen fixing method.

Experienced builders use this weight to fine tune static balance and local mass distribution rather than as a single performance fix. As a tuning accessory its effect is determined by chassis geometry, roller positions, and the broader setup. It is commonly added on performance-focused cars as part of incremental adjustments.

Fitment tips: check internal clearance beneath the body shell, ensure the added mass does not interfere with rollers or guide stays, and confirm a secure mounting plan before committing to a permanent fix. The item is described for Mini 4WD use; always verify fit on your specific chassis.