This specifically designed 550-size motor heat sink is a replacement heat sink for the Novak 1/8-scale Conversion Kit. This bottom-mount heat sink replaces the sleeve on Novak’s 550-size brushless motors and includes Thermal Heat Transfer Grease – 1.5g (#5430) for optimal heat transfer. This kit also includes all of the hardware necessary for easy installation. Having more than one conversion kit heat sink, allows users of converted 1/8-scale vehicles to easily change motors to suit proper track conditions. The motor heat sink is made from anodized aluminum and weighs 68.2g (2.41 oz).