- Home
- Peterbilt
- Peterbilt 379
- Peterbilt 379 Exterior
- Peterbilt 379 Roof Caps & Sleeper Conversion Kits
- Peterbilt Ultracab Fatback 6” Day Cab Conversion Kit
Peterbilt Ultracab Fatback 6” Day Cab Conversion Kit

- SKU:
- 66790
- Condition:
- New
Description
Peterbilt Ultracab Fatback 6” Day Cab Conversion Kit
*Please Add Your Year, Make, Model & VIN Number Above
Convert your Ultracab sleeper into a sleek 6” extended day cab. Pre-assembled panel with window, OEM upholstery, tool tray & all hardware included. Order now!
- Ultracab Fatback 6” Day Cab Conversion
- Fits Peterbilt Ultracab Trucks
- 6 Inch Extended Cab
- Pre-Assembled Fiberglass Panel
- Window Included
- Pre-Installed Sound Deadening Core
- Panel is CNC Cut and Drilled for Perfect Fit
- OEM Upholstery
- Class A Gel Coat Finish
- All Hardware and Sealer (Hucks or Rivets) Included
- Diamond Plate Tool Tray
- Sold As A Kit
Upgrade your Ultracab sleeper with the Peterbilt Ultracab Fatback 6” Day Cab Conversion Kit—a premium solution built for a factory-quality finish and serious performance. Designed specifically for Peterbilt Ultracab models, this pre-assembled fiberglass panel features a 6" extended cab profile that adds comfort and cab space without the bulk of a full sleeper. It includes a clear window, CNC-cut precision for a perfect fit, and a pre-installed sound-deadening core for a quieter ride. Finished with a high-gloss Class A gel coat and OEM-style upholstery, this conversion delivers sleek interior appeal and durability. The kit also includes all hardware and sealer (Hucks or rivets) along with a diamond plate tool tray for added functionality. Whether you're lightening your truck for weight compliance or enhancing your rig’s working setup, this all-in-one conversion is ready for installation straight out of the box.
*This product ships LTL Freight and the shipping quotes are based on commercial addresses only. If you need a quote to have this delivered to a residential address or farm, please call us so we can provide you with an accurate shipping price. Failing to provide a commercial address could result in delays with processing your order. Please refer to our Shipping Info section at the bottom of our website for more information. All LTL shipments must be inspected prior to signing delivery documentation. Notate damages on the BOL with the freight carrier at time of delivery. Failure to do so will void the claims process and the receiver will be liable for damages.
If you should need additional Truck Parts and Accessories, please don't hesitate to call our toll-free number 1-888-888-7990

Warranty Information
Additional Information
Mounting Instructions: |
|
shipping: |
LTL |
netsuite_category: |
Other : Cab Conversion |
Reviews
Loading...
We're currently collecting product reviews for this item. In the meantime, here are some company reviews from our past customers sharing their overall shopping experience.
- 5129K+ (78%)
- 427K+ (17%)
- 36861 (4%)
- 2752 (0%)
- 1994 (1%)
- Highest to Lowest
- Newest to Oldest
- Favorite Reviews
- All Ratings
- 5 ★ Reviews
- 4 ★ Reviews
- 3 ★ Reviews
- 2 ★ Reviews
- 1 ★ Reviews


Continue to feedback.
No thanks. I would rather not participate in rating.
