Description

Headlight Adapter – RetroBright – Housings / Wiring Pigtails Included – Plastic – Black – H4 to Non Standard H4 – Kit

Why Choose Us?



Frequently Asked Questions​

As an Authorized Automotive Retailer in the United States, we take pride in guaranteeing 100% authentic products from all brands available on our website. With partnerships spanning 1,000+ brands and a network of 20+ distributor warehouses nationwide, we maintain millions of auto parts in inventory across the USA, ensuring quick shipping and reliable service to our customers. When you shop with us, you're investing in quality and trust.
We believe we have the fastest backorder system in the U.S. auto parts industry, thanks to our strong partnerships with brands and vendors. Nearly all backordered auto parts are shipped directly by the vendors without any additional delays, or they are placed as special orders on the same day. In most cases, backordered parts are delivered within 5-10 days.
We offer unbeatable prices and the best shipping rates on auto parts, with exclusive protection and insurance included to safeguard your order from damage or loss. Enjoy convenient door-to-door delivery, real-time tracking, and our 100% satisfaction guarantee for a smooth, worry-free experience.
Our standard shipping typically takes 1-3 business days. We will provide estimated shipping time for each product. While we aim to deliver as quickly as possible, this timeframe ensures all orders are processed, prepared, and dispatched with care. If the products are not ready for shipping in 72 hours, we will refund you 100%
Absolutely. Once your order is dispatched, you’ll receive an email with tracking details, so you can follow your shipment every step of the way. Every step of shipping process will be sent through email notifications or using tracking page.
Every product page includes a stock level indicator to show what’s available. We always update the inventory 24/24. We’ll be happy to check availability and provide updates on new stock arrivals if you need a help.
We’re sorry to hear that your order wasn’t delivered in perfect condition. Please email us with your order number, a description of the issue, and photographs of the damaged item. Once we receive this information, we’ll arrange for a replacement or refund and handle the return process.
You can return items within 30 days of receipt. Ensure the product is new in its original packaging and securely wrapped for safe transit. Once we receive the item in sellable condition, we’ll issue a full refund for the product value. Contact us for the return address and further instructions.

Reviews

There are no reviews yet.

Be the first to review “RETROBRIGHT Adapter H4 H821”

Your email address will not be published. Required fields are marked *

Recently viewed products

  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    PERTRONIX IGNITION HEI III Performance Module (4 Pin) D72000

    SKU: PRTD72000
    Product information
    • Weight0.125 lbs
    • Dimensions4.35 × 3.1 × 3.05 in
    • Material

      Ceramic

    • Color

      Black

    • Finish

      Natural

    • Quantity

      Each

    • Product Line

      Flame-Thrower

    Details...
    Original price was: $116.00.Current price is: $105.21.Add to cart
    Original price was: $116.00.Current price is: $105.21.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION 454 Chevy Hei 31369

    SKU: MSD31369
    Product information
    • Weight1.99 lbs
    • Dimensions10.65 × 10 × 2.75 in
    • Product Line

      Super Conductor

    • Quantity

      Kit

    • Variant

      Yes

    • Variant Group

      Spark Plug Wires35

    • Variant Column

      Wire Color

    Details...
    Original price was: $195.00.Current price is: $176.95.Add to cart
    Original price was: $195.00.Current price is: $176.95.
    Quantity Only 4 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    RJS SAFETY Single Layer White Skeleton Gloves Medium 600080133

    SKU: RJS600080133
    Product information
    • Weight0.195 lbs
    • Dimensions14.55 × 6 × 1.4 in
    • Color

      Black

    • Quantity

      Pair

    • Variant

      Yes

    • Product Line

      Skeleton

    • Sfi Rating

      3.3/1

    Details...
    Original price was: $148.00.Current price is: $133.96.Add to cart
    Original price was: $148.00.Current price is: $133.96.
    Quantity Only 5 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    RACING OPTICS Helmet Post Kit 9900 Post Kit

    SKU: ROP9900
    Product information
    • Weight0.025 lbs
    • Dimensions4.3 × 3.15 × 0.55 in
    • Material

      Aluminum

    • Color

      Gold

    • Finish

      Anodized

    • Quantity

      Pair

    • Head Style

      Slotted

    Details...
    Original price was: $17.94.Current price is: $14.95.Add to cart
    Original price was: $17.94.Current price is: $14.95.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SKYJACKER Black Max Shock W/Black Boot B8592

    SKU: SKYB8592
    Product information
    • Weight6.23 lbs
    • Dimensions24.6 × 3.25 × 3.15 in
    • Product Line

      Black MAX

    • Internal Design

      Twintube

    • Gas/Hydraulic

      Hydraulic

    • Compressed Length

      14.775 in

    • Extended Length

      24.63 in

    Details...
    Original price was: $70.00.Current price is: $62.91.Add to cart
    Original price was: $70.00.Current price is: $62.91.
    Quantity Only 4 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    K AND N ENGINEERING Performance Air Intake 63-9042

    SKU: KNE63-9042
    Product information
    • Weight17.323 lbs
    • Dimensions24.2 × 20.2 × 15.6 in
    • Tube Material

      Plastic

    • Tube Color

      Black

    • Tube Finish

      Natural

    • Filter Style

      Washable

    • Filter Color

      Red

    Details...
    Original price was: $638.00.Current price is: $579.99.Add to cart
    Original price was: $638.00.Current price is: $579.99.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SPAL ADVANCED TECHNOLOGIES Fan Mounting Bracket Each 30130011

    SKU: SPA30130011
    Product information
    • Weight0.12 lbs
    • Dimensions6.45 × 2.5 × 1.15 in
    • Material

      Plastic, Steel

    • Color

      Black

    • Finish

      Natural, Powder Coat

    • Quantity

      Each

    • Mounting Style

      Bracket

    Details...
    Original price was: $4.00.Current price is: $2.97.Add to cart
    Original price was: $4.00.Current price is: $2.97.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    TRANS-DAPT Carburetor Spacer 2109

    SKU: TRA2109
    Product information
    • Weight2.423 lbs
    • Dimensions8.75 × 7.3 × 1.55 in
    • Hardware Included

      Yes

    • Material

      Aluminum

    • Color

      Natural

    • Finish

      Natural

    • Quantity

      Each

    Details...
    Original price was: $55.14.Current price is: $50.13.Add to cart
    Original price was: $55.14.Current price is: $50.13.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    GRANT Chrome Horn Button-Cobra 5683

    SKU: GRT5683
    Product information
    • Weight0.16 lbs
    • Dimensions4.1 × 4.1 × 2.3 in
    • Style

      Cap

    • Logo

      Ford Cobra Logo

    • Logo Color

      Black / Chrome

    • Intended Steering Wheel

      Classic / Challenger

    • Material

      Steel

    Details...
    Original price was: $20.46.Current price is: $18.60.Add to cart
    Original price was: $20.46.Current price is: $18.60.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    ADVANCED CLUTCH TECHNOLOGY ACT Product Guide 2014 101

    SKU: ACT101
    Product information
    Details...
    Original price was: $1.10.Current price is: $1.00.Add to cart
    Original price was: $1.10.Current price is: $1.00.Add to wishlist

    106