ST Racing Concepts Traxxas TRX-4M Brass Upgrade Essentials Combo. Constructed from high quality heavy brass, this optional brass upgrade combo is intended for the Traxxas TRX-4M 1/18 micro crawler to add a total of (44g) much needed unsprung weight down low to lower the center of gravity, increase crawling performance and stability as the ultimate performance and durability upgrade. Take your TRX-4M performance to the next level with this brass essentials combo.

Features:

• Perfect fit for the Traxxas TRX-4M
• Adds a total of (44g) unsprung weight
• CNC-machined Brass
• Provide extra durability and reliability
• Anodized black

Includes:

• (2) Brass differential covers (7g)x2
• (2) Brass steering knuckles (6.5g)x2
• (2) Brass caster blocks (4.5g)x2
• (4) Brass hex adapters (2g)x4