Trinity "X Factor" 8.5T Modified Brushless Motor. Features: 10% Lighter than Previous Motors Weight (158g avg) Updated Sensor Board Design 0 - 60 Degrees of Timing adjustment Revolutionary timing ring & locking end plate systems saves weight X-Flow Cooling which pulls more air through the can, reducing motor temps 2pc CNC Machined Aluminum can allows for more accurate deviation reading 90 Degree Solder Tabs The X-Factor Modified Series come assembled with TEP1151 Rotor. Optional Rotors Available for Fine Tuning.