Description: 4 poles Hi-torque motor design CNC machined 6061 T6 billet alumium heatsink can High purity copper windings maximizes efficiency High RPM ABEC5 oversized bearings Universal fit all 1/8 brushless cars-multi-mounting system for M3 or M4 screws Precision balanced rotor, smoothness for best reliability and maximum RPM Stator - Super Thin (0.35mm) laminations Removable/replaceable Precision engineered for maximum energy conversion ROAR legal Specification: RPM: 2250KV Max Current: 155A Max voltage?