3D Printed Cabin Air Filter Adapter for Jeep Wrangler TJ/LJ (2003–2006) – Fits JK Filter FDC11777 – PETG

Upgrade your 2003–2006 Jeep TJ / LJ with a functional cabin air filter — 3D printed and easy to install!

Tired of trail dust, pollen, and debris blowing directly into your Jeep’s cabin? This custom 3D-printed Cabin Air Filter Adapter allows you to retrofit a modern air filter into your TJ or LJ HVAC intake system — a feature that was never included from the factory.

✅ Product Highlights

✔ Compatible with:
Jeep Wrangler TJ (2003–2006)
Jeep Wrangler LJ Unlimited (2004–2006)

✔ Uses single JK filter:
Fram FDC11777 or equivalent
(2011–2017 Wrangler JK cabin filter)

✔ Improved One-Piece Design:
The base adapter and filter holder are integrated into a single reinforced part for improved durability and reduced vibration compared to earlier two-piece versions.

✔ What’s Included:

• 3D printed cabin air filter adapter (integrated base + holder)

⚠ Mounting screws are not included.
Different vehicles and installations may require different hardware. Most installations use #8 self-tapping screws or M4/M5 bolts.

If you prefer, send us a message with your Jeep model and we can recommend the correct hardware.

✔ Material:
Heat-resistant PETG or ABS, suitable for engine bay temperatures and outdoor conditions.

🧰 Installation

1. Remove the factory cowl cover (between the hood and windshield)

2. Remove the stock HVAC intake duct if present

3. Place the adapter over the factory HVAC intake opening

4. Insert the cabin air filter (follow airflow arrow)

5. Secure the adapter using appropriate mounting screws

6. Reinstall the cowl cover

Installation time: about 10 minutes. No special tools required.