PRECISION ENGINEERING Introducing the HPI Racing HPI76979, a meticulously crafted 19 Tooth Aluminum Threaded Pinion Gear designed specifically for the HPI RS4 Nitro 3. IDEAL FOR TWO-SPEED TRANSMISSIONS This pinion gear is tailored for two-speed transmissions, ensuring optimal performance in your racing adventures. CUSTOMIZABLE PERFORMANCE With a 19 tooth configuration, this pinion gear allows for a balance between acceleration and top-end speed—lower teeth enhance low-end torque while higher teeth maximize speed. GENUINE HPI PRODUCT Rest assured, this is a brand new, top-quality component from HPI, denoted by the product code HPI76979. Elevate your RC experience with this essential component that perfectly combines precision engineering and high-performance functionality.