This is a replacement ProTek R/C 14x25.4x6mm Ceramic ...
Rear Bearing, intended for use with the ProTek R/C Samurai 321B, RM.1, RM, S03 and R03 Nitro Engine. This bearing can also be used with the O.S. VZ-B V-Spec, 30VG, the original ...
This is a Protek R/C 14.5x26x6mm "MX-Speed" Rear ...
Engine Bearing, and is intended for use with any nitro engine that requires a 14.5x26x6mm rear bearing. ProTek MX-Speed engine bearings offer decreased resistance, increased speed, load handling capabilities and extended bearing ...