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Kuryakyn

Kuryakyn Headlamp Adapter Harness

$20.95

SKU: K054 5478

In Stock
In Stock
Ships by Sep 15
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Overview

The Kuryakyn 5478 is a headlamp adapter harness designed to facilitate the installation of H4-style LED headlights on select Harley-Davidson Touring and Trike models from 2014 to 2020. This harness ensures a seamless connection between new LED headlamps and the motorcycle's existing wiring. It features heat-shrinked wiring for enhanced protection and durability. The adapter is compatible with Harley-Davidson FLHR Road King models (2014-2020) and FLHRXS Road King Special models (2017 onward).
Show original supplier description

Part #: 5478

Allows L.E.D. headlights with H4 style plugs to be installed on '14-'18 Harley-Davidson Touring and Trike Models

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandKuryakyn
Part NumberK054 5478
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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