This is a rear bearing from Boca Bearings designed to fit the O.S. MAX VZ-B and VZ-B V-Spec off-road competition buggy engines. This is a Chrome, Open, Polymite Retainer bearing. This bearing also fits recent Novarossi and RB Concepts engines that require the special 25.4 mm rear bearings such as the P5, 421B, BS-21SB and C5 engines. The bearing dimensions are 14mm inner, 25.4mm outer and 6mm thick. This bearing is open to allow oil to lubricate the bearings during use. If you run the OS VZ-B or VZ-B V-Spec engine, you probably want one of these bearings to keep the engine running well, especially if your engine starts making loud bearing noises at idle. This bearing will also fit any other .21 competition buggy engine that uses the same bearing dimensions.
NOTE: This bearing should be installed so that the balls face
the rear of the engine (towards the backplate), in order to allow
proper lubrication. Also, this bearing does NOT fit Novarossi P5X and 421B/X engines. Those engines use a 14x25.8x6 rear bearing.