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Ignitions and Electrical Wiring Components

RetroBright

Adapter H4 Non-Standard Plug Pin-Out Swap Vehicles With Non-Standard 3 Prong Headlight Plugs or That Require a Pin Out Swap Entry Level Plastic Version RetroBright

$7.57 $4.55 Save $3.02

SKU: R07V H821

In Stock
In Stock
Ships by Aug 6
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

Part #: H821

If you don't feel comfortable cutting up your factory wiring or don't want to attempt to swap pins on your headlight plugs, Holley RetroBright adapters make it a plug-and-play affair. If the standard H4 male plug used on Holley RetroBright Headlights will not fit your female socket or you need to swap pins around to match up properly, these harnesses will make the job quick and easy.Features and Benefits:Allows Holley RetroBright Headlights to connect to any non-standard H4 Sockets or those that require a pin swap Eliminates the need to cut factory wiring Can be used to replace old and brittle factory sockets Easy to follow guide for common non-standard conversionsAssociated Comments:The male plug (RBEC120) is also included and must be assembled once the proper pinout of the vehicle is determined. Simply slide the terminals in with the small pin facing inward and tug gently to ensure it has seated.If it pulls back out, use a small screwdriver or stiff metal object to push it outward just a fraction of an inch more until it seats in the male connector. See image 5.Details:Connector: H4Connector Gender: Male FemaleEmission Code: 6Material: CeramicQty: 2.0Terminal Type: Blade Pin

MIA's Description

The RetroBright headlight adapter is a plastic, black adapter designed to connect H4 headlights to non-standard H4 sockets. This kit includes housings and wiring pigtails, eliminating the need to cut factory wiring. It is specifically designed for vehicles with non-standard 3-prong headlight plugs.

Fitment

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Specifications

BrandRetroBright
Part NumberR07V H821

Buy with Confidence

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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