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Installing air conditioning to your hot rod? Need cooling fan relays to operate off of a thermostatic switch and when your a/c is on? The dual activation cooling fan relay kits by Painless Performance are exactly what you need. Only a few minutes for the installation and your cooling fans will come on when the engine reaches the preset temperature of the thermostatic switch mounted in the engine head or when the a/c is turned on. This kit includes: (3) 40-amp relays with mounting bases, fuse holder w/70-amp fuse, pre-terminated and printed wire harness, thermostatic switch (195 degrees on/185 degrees off) with thread size: 3/8"-18NPT), 1/2" NPT to 3/8" NPT adapter, two LT1/LS1 fan connectors, mounting hardware, insulated terminals and detailed instruction sheet.