Exotek introduce two new option parts for HPI Racing’s Micro RS4 line of cars. First up is the titanium rear axle and ball diff set that is designed to replace the stock gear differential. The externally adjustable ball differential makes for smooth acceleration and swift diff action setup. The alloy left and right axle hubs are polished and anodised in factory orange for looks and durability and the gear pulley set is machined from lightweight but durable POM. Included in the set are heavy duty 4x8mm axle bearings and a lightweight yet strong titanium rear axle shaft. Also new is the alloy and steel high performance CVD set for the Micro RS4. Designed to better withstand higher performance motors and batteries the driveshafts also look great too with their anodised factory orange finish.