Upgrade D hinge pin holder for PRO-MT 4x4 is a rugged replacement part designed for the PRO-MT 4x4 RC truck to keep hinge pins secure during aggressive driving.

Made from 7075 aluminum and finished in black anodize, it is nearly twice as thick as the stock holder for added durability in extreme use. It preserves the original geometry to maintain precise fit and handling, and it also fits PRO-Fusion SC 4x4.