Here we have the common range of relays you will need for your custom builds.
These we use daily and know they will put up with the job. Fuel pump fans or just lights
Relays are used for many car electronic applications to turn on/off almost any device.
They are also used when a device draws heavy amperage:
such as car alarms, remote starts, fog lights, stereos, fans,HID headlights, pop doors, air horns, and much more.
1 relays with 1 sockets
12 Volt 4-prong relays
12V 40AMP ON/OFF 4 pin perfrct for horn lights up to 35W
12V 80AMP ON/OFF 4 pin Fuel pump light over 35W
Relay box size 27mm x 24mmBracket with 6mm hole
Can be switch by + or Neg -