This front suspension arm set is a drop-in replacement for HPI Bullet cars and is identified as model BUL-18003-GU. The gunmetal alloy pieces are intended for Bullet 3.0 MT and ST front suspension layouts and will not alter the chassis geometry when fitted.
Fit these arms when you need a durable spare or a direct-fit upgrade to cut flex compared with original plastic components. Installation uses standard removal and refit steps: remove the hub and pivot pins, fit the new arms, reattach existing hardware and check full suspension movement and steering sweep. Only basic hobby hex drivers are required.
In service the gunmetal arms help the front end keep its alignment under impact and aggressive driving on nitro scale off-road models. They do not significantly affect ride height; handle geometry tuning should be done via shocks and toe/inset settings.
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