Squareback Taillight Base with Circuit Board

Perfect base for installing our Low Profile Integrated Taillight.

Includes:

• Taillight base
• Circuit Board

A clean rear fender can completely transform the look of your motorcycle.

The Custom Dynamics Squareback Taillight Base with Circuit Board is the perfect foundation for installing any squareback taillight or low-profile integrated taillight while simplifying wiring with a built-in circuit board.

Designed for a factory-quality fit. Clean wiring. Aggressive styling. Everything your Harley deserves.

🏁 Squareback Taillight Base with Circuit Board

Specifically designed to replace OEM taillight bases and work with OEM taillights, aftermarket square back taillight and with the Low Profile Integrated Taillight. This taillight base includes an integrated circuit board, making it easy to connect your factory wiring harness while creating a cleaner, more modern rear end.

Whether you're building a performance bagger, customizing your Softail, or updating your Dyna, this base provides a clean and professional installation.

📦 Includes

• Squareback Taillight Base
• Integrated Circuit Board

🏍️ Fitment

Fits a wide variety of Harley-Davidson motorcycles, including:

• Touring Models
• Softail Models
• Dyna Models
• Low Rider
• Low Rider S
• Low Rider ST
• Street Bob
• Road Glide
• Street Glide
• Road King
• Sportster models
• Many additional Harley-Davidson applications

Please review the complete fitment guide below before ordering.

⚙️ Why Upgrade

Factory rear lighting often leaves bulky components and exposed wiring that distract from an otherwise clean build.

This taillight base helps create:

• A streamlined rear fender
• Cleaner wiring installation
• Factory-style fit
• Easy installation with compatible lighting
• A modern custom appearance

It's a simple upgrade with a big visual impact.

🔌 Circuit Board Included

One of the biggest advantages of this taillight base is the included circuit board.

Benefits include:

• Plug-and-play wiring connection
• Cleaner installation
• Reduced wiring clutter
• Easier integration with compatible lighting

Everything needed for the electrical connection is already built into the base.

🔥 Built for Integrated LED Taillights

This base is the perfect companion for riders installing a Low Profile Integrated Taillight.

The result is:

• Cleaner rear styling
• Integrated brake and running light appearance
• Modern performance-inspired look
• Reduced visual clutter

Perfect for club-style bikes, performance baggers and custom Harley builds.

⚠️ Installation Notes

For 2022–2025 Low Rider ST (FXLRST) and 2022 Low Rider El Diablo (FXRST) models:

• OEM rear turn signals must be removed during installation.

Please verify your current setup before beginning installation.

Complete Your Rear Fender Upgrade

• Rear Fender 
• LED Turn Signals
• License Plate Relocation Kits

Fitment Guide:

 Check us out on YouTube.