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. Dual activation cooling fan relay will turn your cooling fans on when the engine reaches the preset temperature of the thermostatic switch mounted in the engine head or when the AC is turned on Ideal for installing air conditioning in your project car Features simple to use Positaps for the ignition and AC compressor connections Kit includes Three 40amp relays with mounting bases wiring, fuse holder 70amp fuse, two LT1LS1 fan connectors, thermostatic switch, adapter and insulated terminals