Electro & Company is proud to bring you the Ultimate Razor Heatsink to help bring out the full potential of your razor build, and beyond! This heatsink was designed to utilize all of the available space on the razor platforms, have maximum surface area, TWO fan mounts, clearance for street tires & retrain compatibility for all major models. The Ultimate Razor Heatsink will slip over any MY1020 motor with edge to edge coverage and fits Razor MX500, MX650, SX500 & RSF650 models with no modifications.  Heatsink Coverage is truly edge to edge and 360 degrees! Surface area on a factory MY1020 is 62692.052 mm^2 and after adding the Ultimate Razor Heatsink the Surface Area is Area 300,900 mm^2 . THAT CALCULATES TO A 379.96% INCREASE! Temperatures can be as much as 42.98% lower with NO FAN when using the Ultimate Razor Heatsink. Cooling can be increased EXPONENTIALLY by attaching ONE or TWO 80mm Fans to either the TOP or BOTTOM mounts on the Ultimate Heat Sink. (ULTIMATE RAZOR 12v KIT and BLOWER FAN AVAILABLE AS A SEPARATE ITEM) We are confident there is no better heatsink for an MY1020! Combined with our Ultimate DCDC and Blower Fan we are excited to raise the ceiling on MY1020 motors max usable power numbers! INCLUDEDS 1x E&C Ultimate Razor Heatsink1x 4 Gram Tube of Thermal Paste1x 5pc set of m4 hardware (clamp) Specifications Ultimate Heat Sink Area    300,900 mm^2 Mass    808.075 g Physical Material    Aluminum 6063 Length      125.277 m Width      133.639 mm Height      135.00 mm MY1020 Motor Area    62692.052 mm^2 Mass    3229.036 g Physical Material    Aluminum 6061 Length      107.00 mm Width      107.00 mm Height      133.00 mm All Simulation Tests Use 30c ambient 100w of heat constant power input emissivity/absorptivity value: .1  Convection value: 40.00 W / (m^2 K) ALL NUMBERS ABOVE ARE BASED ON SIMULATIONS.