Overview: The Firma 3300Kv brushless motor is a great choice for 1/10 scale 4WD, 2WD and on-road models running on 2S – 3S LiPo power. Featuring a low cog 4-pole 8-magnet rotor design, CNC machined aluminum housing, insulated high purity copper windings, high-quality alloy steel 3.175mm (1/8") output shaft, and precision bearings for high durability and smooth rotation. Preinstalled with 4mm gold plated bullet connectors for easy installation, and perfectly matched for the Firma 85A Smart ESC. Features: Excellent upgrade for 540- and 550-size brushed motors with the same diameter and mounting pattern (vehicle must accept pinions with a 1/8" mm bore) High-quality 4-pole sintered rotor 4mm gold plated bullet connectors High-quality construction with precision ball bearings and hardened steel 1/8" shaft