MN Model Parts Metal Servo Arm – D4U-10

The MN Model D4U-10 Metal Servo Arm is a premium replacement for the stock plastic servo horn used in MN-series RC crawlers. Crafted from high-strength aluminum alloy, it enhances steering precision and prevents flex or stripping under heavy torque loads.

With a secure spline fit and reinforced screw clamp design, this servo arm ensures stable operation and long-term durability — perfect for both brushed and brushless setups. Whether you’re upgrading for performance or reliability, the D4U-10 is a must-have part for your MN crawler’s steering system.

Key Features

• Full Metal Construction: CNC aluminum alloy build for maximum strength.

• Improved Steering Response: Eliminates flex and ensures consistent torque transfer.

• Perfect Fit: Designed for MN Model servos and compatible servo splines.

• Lightweight & Durable: Maintains rigidity without adding excess weight.

• Direct Replacement: Installs easily with included mounting hardware.

Compatible Models

✅ Direct Fit

• MN128

• MN99 / MN99S

• MN90 / MN90K

• MN86 / MN86S

• MN82 / MN82S

• MN78

• MN91

• MN168

⚙️ Also Compatible with WPL Models (using 25T servo spline)

• WPL C14 / C24 / C44KM

• WPL B14 / B24

• WPL D12 / D42

🔧 Tip: For best results, use with MN or standard 17G/25G metal gear servos.

Specifications