H4 Headlight Relay Kits

Rated 5.00 out of 5 based on 1 customer rating
(1 customer review)


Choose the HRK1 Kit if you own a vehicle with a dual filament HI/LOW beam mounted on each side. Choose the HRK2 Kit if you own a vehicle with a dual filament HI/LOW beam and a single filament HI beam bulb on each side.



Either kit includes the following:

  • (1) Pre-assembled Harness, loomed in Semi-Rigid Split Braid tubing, and terminated with OEM connectors
  • (2) 40 Amp Hella Waterproof Relays
  • (1) Waterproof ATC Style Fuse Holder & 30 Amp ATC fuse
  • All hardware required to install it

You absolutely, positively will not have to run to the hardware store to install this kit. How do we know? Simple. We’ve actually installed them ourselves.


Headlight Relay Kit Extensions

In some vehicles, the battery is in a location at which the harness will not reach both it and the headlights. In these cases, a Headlight Relay Kit Extension is required. These extensions are designed to plug directly into the harness of either the HRK1 or HRK2 to extend the main power lead. No special tools are required to install them.

Each kit includes a pre-assembled extension covered in split braided tubing as well as cable ties for an absolutely neat installation.

1 review for H4 Headlight Relay Kits

  1. Rated 5 out of 5

    Scot Allyn

    Tony’s HRK2 relay kit really woke up my headlights! I installed the kit on my 1984 Dodge about two months ago, and am still pleasantly surprised when I drive at night. The high beams, especially, are hugely brighter on the dark back roads of Ohio. The instructions were easy to follow and I didn’t need to add anything, not even a washer. Thank you, Tony, for helping me keep my 32-year-old daily driver on the road!

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