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This is a bellcrank assembly designed for the Losi Micro Rally and SCT. It does not fit the stock chassis. It's meant for use on a custom carbon fiber or aluminum chassis. The steering arms are designed to fit two 4mm (ID) x 7mm (OD) x 2.5mm (W) bearings (not included); one in the top and one in the bottom. The screw holes are very small so it's common for some of them to be filled in. You'll need to drill them out a little with a 1mm drill bit.