Exterior Components› Lights and 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 Premium RetroBright
SKU: R07V H820
Beginner — under 30 min
Description
Part #: H820
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 on common non-standard wiring 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 FemaleConnector Quantity: 2.0Emission Code: 6Material: CeramicQty: 2.0Terminal Gender: Male FemaleTerminal Type: PinWire Quantity: 3.0
Headlight Wiring Harness - RetroBright - H4 Connector - Ceramic - Kit
MIA's Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | RetroBright |
| Part Number | R07V H820 |
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.
View Full Return Policy