Introduction
This manual provides comprehensive instructions for the installation, maintenance, and troubleshooting of your Spec-D Tuning Quarter Panel Louvers. These louvers are designed to enhance the aesthetic appeal of your vehicle's rear quarter panels.
Please read this manual thoroughly before beginning installation to ensure proper fitment and long-term performance.
Product Overview
The Spec-D Tuning Quarter Panel Louvers are exterior accessories designed to fit over the rear quarter windows of compatible vehicles. They feature a slotted design, contributing to a distinct visual style.

Image: A pair of black, glossy slotted quarter panel louvers, showcasing their design and finish.
These louvers are constructed for durability and are intended for direct application to the vehicle's quarter panels.
Compatibility
This product is specifically designed for:
- Ford Mustang Coupe models manufactured between 2005 and 2014.
Note: This product is NOT compatible with 2-door convertible models.
What's in the Box
Upon opening the packaging, verify that all components are present and undamaged:
- 2 x Quarter Panel Louvers (Left and Right)
- Mounting Hardware (brackets, screws, U-nuts, 3M adhesive tape)

Image: Various mounting components including metal brackets, screws, U-nuts, and strips of 3M adhesive tape, essential for securing the louvers.
If any items are missing or damaged, please contact customer support before proceeding with installation.
Installation Instructions
Installation of these quarter panel louvers is designed to be straightforward, requiring minimal to no modifications to your vehicle. However, professional installation is recommended for optimal results.
Required Tools (Not Included):
- Cleaning solution (e.g., rubbing alcohol)
- Clean microfiber cloths
- Drill (if drilling is required for your specific installation method)
- Screwdriver set
Installation Steps:
- Prepare the Surface: Thoroughly clean the surface of the vehicle's quarter panel window where the louver will be installed. Use a suitable cleaning solution to remove all dirt, wax, and grease. Allow the surface to dry completely.
- Test Fit: Carefully place the louver onto the quarter panel without removing any adhesive backing. Ensure it aligns correctly with the contours of the window and the vehicle body. Mark the precise positioning if necessary.
- Prepare Mounting Hardware: Attach the provided 3M adhesive tape to the designated areas on the mounting brackets. Ensure firm adhesion of the tape to the brackets.
- Secure Brackets: Depending on the specific design, the brackets may attach to the vehicle using existing points or require drilling. If drilling is necessary, use appropriate drill bits and take precautions to avoid damage to the vehicle. Securely fasten the brackets.
- Apply Louver: Carefully remove the backing from the 3M adhesive tape on the brackets. Align the louver with the secured brackets and press firmly into place. Apply even pressure across the entire surface to ensure maximum contact with the adhesive.
- Final Securement: Use the provided screws and U-nuts to further secure the louver to the brackets, ensuring a tight and stable fit. Do not overtighten.
- Curing Time: Allow the adhesive to cure for at least 24 hours before exposing the vehicle to high speeds, car washes, or extreme weather conditions. This ensures optimal bonding strength.

Image: A side profile of a single quarter panel louver, illustrating its angled design and how it would sit on the vehicle's window.
Maintenance
To maintain the appearance and longevity of your quarter panel louvers, follow these simple maintenance guidelines:
- Regular Cleaning: Clean the louvers regularly with mild automotive soap and water. Avoid abrasive cleaners or harsh chemicals that could damage the finish.
- Soft Cloth: Use a soft microfiber cloth or sponge for cleaning to prevent scratches.
- Rinse Thoroughly: Rinse the louvers thoroughly with clean water after washing to remove all soap residue.
- Avoid Pressure Washers: While generally durable, excessive pressure from power washers directed at the louvers or their mounting points could potentially compromise their adhesion or structural integrity over time.
Troubleshooting
If you encounter issues with your quarter panel louvers, consider the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Louver does not fit correctly or appears oversized. |
|
| Louver detaches or becomes loose. |
|
| Mounting hardware issues (e.g., wrong screws). |
|
For persistent issues not covered here, please contact Spec-D Tuning customer support.
Specifications
| Attribute | Detail |
|---|---|
| Brand | SPEC-D TUNING |
| Model Number | WLUQ-MST05A |
| Manufacturer | Spec-D Tuning |
| Item Weight | 3.04 pounds |
| Product Dimensions | 33 x 18 x 5 inches |
| Exterior Finish | Black |
| Compatibility | 2005-2014 Ford Mustang Coupe (Excludes Convertibles) |
Warranty and Support
Spec-D Tuning offers the following warranty for this product:
- 30 Days Refund Policy: For returns or refunds within 30 days of purchase.
- 90 Days Defective Item Replacement Warranty: For replacement of defective items within 90 days of purchase.
For any issues, questions, or to claim warranty service, please contact Spec-D Tuning customer support directly. Contact information can typically be found on the manufacturer's official website or through your point of purchase.





