This front arm set is intended for HPI Bullet platforms and is supplied as model BUL-18003-OR. The components feature an orange anodised aluminium finish, serving as a direct replacement for stock plastic arms while aiming to maintain original suspension geometry and pivot spacing.
Compatibility is aligned with the BULLET 3.0 MT and ST (Nitro Engines) series as noted in the title. Fitting is conventional for Bullet front lower arms: remove the factory parts, transfer hubs and pins where needed, then refit using the original mounting points and hardware. Typical hobby hex tools are sufficient for the swap.
Using alloy arms reduces deformation under load which can stabilise steering inputs, particularly at higher speeds or when running heavier tyres. After installation check hinge pin wear and shock tower alignment, and verify full travel to prevent inadvertent contact or restriction.
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