Edelbrock Part #15804 Cooling System Upgrade kit is necessary when installing Edelbrock Supercharger System #1580 or #1585 in a 2005-06 Mustang GT. This kit relocates the thermostat from the cold side of the radiator to the hot side for improved cooling. Product Features:Silicone MaterialClamp-On Attachment TypeClamps IncludedMounting Hardware IncludedFor Improved Cooling
