null

Day Cab Conversion

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Fiberglass Ultra Cab XL Standard Day Cab Conversion Kit W/ 6 Inch Extended Cab For Peterbilt

    Fiberglass Ultra Cab XL Standard Day Cab Conversion Kit W/ 6 Inch Extended Cab For Peterbilt

    DAYCAB COMPANY

    $2,509.99
    Ultra Cab XL Standard Day Cab Conversion Kit W/ 6 Inch Extended Cab Fits PeterbiltAdd strength, style, and functionality to your Peterbilt with this Fiberglass Ultra Cab XL Standard Day Cab...
    01-0930017
    SKU:
    01-0930017
    Cab Style:
    Ultra Cab
    Product Type:
    Exterior
    Truck Class:
    Heavy Duty
    Position:
    Kit Full
    Material Options:
    Fiberglass
    Make:
    Peterbilt
    $2,509.99
    Qty in Cart: 0
    Price:
    $2,509.99
    Subtotal:
  • 6 Inch Fiberglass Ultra Cab XL Big Window Kit- Tan For Peterbilt

    6 Inch Fiberglass Ultra Cab XL Big Window Kit- Tan For Peterbilt

    DAYCAB COMPANY

    $2,651.99
    6 Inch Tan Ultra Cab XL Big Window KitElevate your cab configuration with this 6 Inch Fiberglass Ultra Cab XL Big Window Kit in Tan designed for the Peterbilt 389 Ultra Cab setup. Featuring a 6-inch...
    01-0930015
    SKU:
    01-0930015
    Truck Class:
    Heavy Duty
    Position:
    Kit Full
    Material Options:
    Fiberglass
    Cab Style:
    Ultra Cab
    Product Type:
    Exterior
    Make:
    Peterbilt
    $2,651.99
    Qty in Cart: 0
    Price:
    $2,651.99
    Subtotal:
  • Fiberglass Unibilt XL Standard Day Cab Conversion Kit W/ 6 Inch Extended Cab & Window For Peterbilt

    Fiberglass Unibilt XL Standard Day Cab Conversion Kit W/ 6 Inch Extended Cab & Window For Peterbilt

    DAYCAB COMPANY

    $2,766.99
    Unibilt XL Standard Day Cab Conversion Kit W/ 6 Inch Extended Cab & Window Fits PeterbiltUpgrade your Peterbilt with this Fiberglass Unibilt XL Standard Day Cab Conversion Kit with a 6 Inch Extended...
    01-0930042
    SKU:
    01-0930042
    Material Options:
    Fiberglass
    Position:
    Kit Full
    Product Type:
    Exterior
    Cab Style:
    Unibilt
    Style Options:
    Flat Top
    Make:
    Peterbilt
    $2,766.99
    Qty in Cart: 0
    Price:
    $2,766.99
    Subtotal:
  • Aluminum Ultra Cab Day Cab Conversion Kit W/ Window For Peterbilt 378 & 379

    Aluminum Ultra Cab Day Cab Conversion Kit W/ Window For Peterbilt 378 & 379

    DAYCAB COMPANY

    $2,357.99
    Ultra Cab Day Cab Conversion Kit W/ Window Fits Peterbilt 378 & 379Enhance your Peterbilt Ultra Cab with this Aluminum Day Cab Conversion Kit, designed for 378 and 379 models to deliver a durable...
    01-0930023
    SKU:
    01-0930023
    Position:
    Kit Full
    Product Type:
    Exterior
    Cab Style:
    Ultra Cab
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Make:
    Peterbilt
    $2,357.99
    Qty in Cart: 0
    Price:
    $2,357.99
    Subtotal:
  • Fiberglass Day Cab Conversion Kit W/ 4 Inch Extended Back & 19 X 36 Inch Window For Peterbilt 567, 579 Ultra Cab

    Fiberglass Day Cab Conversion Kit W/ 4 Inch Extended Back & 19 X 36 Inch Window For Peterbilt 567, 579 Ultra Cab

    DAYCAB COMPANY

    $3,030.99
    Peterbilt 567 & 579 Ultracab Day Cab Conversion Kit W/ 4 Inch Extended Back & 19 X 36 Inch WindowStep into a cleaner day cab configuration with this Fiberglass Conversion Kit made specifically for...
    01-093000013
    SKU:
    01-093000013
    Position:
    Kit Full
    Material Options:
    Fiberglass
    Product Type:
    Exterior
    Cab Style:
    Ultra Cab
    Make:
    Peterbilt
    $3,030.99
    Qty in Cart: 0
    Price:
    $3,030.99
    Subtotal:
  • 72 Inch Fiberglass Cab Conversion Top For Kenworth Flat Top

    72 Inch Fiberglass Cab Conversion Top For Kenworth Flat Top

    TALLADEGA FIBERGLASS

    $3,091.99
    72 Inch Flat Top Cab Conversion TopTransform the look of your Kenworth flat top with this 72 Inch Fiberglass Cab Conversion Top, designed for stand-up sleeper conversions. Its high-quality fiberglass...
    02-1015002
    SKU:
    02-1015002
    Length Options:
    72 Inch
    Material Options:
    Stainless Steel
    Cab Style:
    Flat Top
    Product Type:
    Exterior
    Make:
    Kenworth
    $3,091.99
    Qty in Cart: 0
    Price:
    $3,091.99
    Subtotal:
  • Fiberglass 6 Inch Ultra Cab XL Big Window Kit For Peterbilt

    Fiberglass 6 Inch Ultra Cab XL Big Window Kit For Peterbilt

    DAYCAB COMPANY

    $2,675.99
    6 Inch Ultra Cab XL Big Window Kit* High Quality Conversion Kit* Ultracab Fatback Big Window Kit Includes:  - 6 Inch Extended Cab  - Pre-Assembled Fiberglass Panel  - Big Window  - Pre-Installed...
    01-093000023
    SKU:
    01-093000023
    Cab Style:
    Ultra Cab
    Product Type:
    Exterior
    Material Options:
    Fiberglass
    Make:
    Peterbilt
    Position:
    Kit Full
    $2,675.99
    Qty in Cart: 0
    Price:
    $2,675.99
    Subtotal:
  • Rubber Sleeper Boot For Flat Top Ring Replaces T096002 For Peterbilt

    Rubber Sleeper Boot For Flat Top Ring Replaces T096002 For Peterbilt

    OPP - ORIGINAL PARTS PROGRAM

    $795.99
    Rubber Boot For In Between The Cab And Sleeper* High Quality Sleeper Boot* Rubber* Sold Individually* Warranty On Sleeper Boots Against Defects In Workmanship & Material From Date Of Purchase*|**...
    T096002
    SKU:
    T096002
    Product Type:
    Exterior
    Truck Class:
    Heavy Duty
    Material Options:
    Rubber
    Make:
    Peterbilt
    $795.99
    Qty in Cart: 0
    Price:
    $795.99
    Subtotal:
  • Fibertech Extended Day Cab Basic Conversion Kit For Kenworth t600, T800, W900

    Fibertech Extended Day Cab Basic Conversion Kit For Kenworth t600, T800, W900

    FIBERTECH

    $3,810.99
    Kenworth Extended Day Cab Basic Conversion Kit* High Quality Basic Conversion Kit* Includes:  - 1 Piece 6 Inch Fiberglass Cab Extension  - Bonded 1 Inch X 2 Inch Aluminum Bracing  - Aluminum Upper...
    02-093004K1
    SKU:
    02-093004K1
    Product Type:
    Exterior
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Material Options:
    Fiberglass
    Ready To Ship:
    Yes
    $3,810.99
    Qty in Cart: 0
    Price:
    $3,810.99
    Subtotal:
  • Fibertech Day Cab Flat Panel Conversion Kit - Panel Only For Peterbilt 378, 379, 386, 388, 389, & 389 Glider Flat Top

    Fibertech Day Cab Flat Panel Conversion Kit - Panel Only For Peterbilt 378, 379, 386, 388, 389, & 389 Glider Flat Top

    FIBERTECH

    $2,567.99
    Peterbilt Flat Panel Conversion Kit* High Quality Flat Panel Conversion Kit* Includes:  - One-piece Fiberglass Panel  - Mounting Hardware  - 3-Piece 6 Inch Fiberglass Cab Extension  - Bonded 1 Inch X...
    01-0930037K1
    SKU:
    01-0930037K1
    Product Type:
    Exterior
    Material Options:
    Fiberglass
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $2,567.99
    Qty in Cart: 0
    Price:
    $2,567.99
    Subtotal:
  • Fibertech Day Cab Flat Panel Conversion Kit - Panel Only For Peterbilt 378, 379, 386, 388, 389, & 389 Glider

    Fibertech Day Cab Flat Panel Conversion Kit - Panel Only For Peterbilt 378, 379, 386, 388, 389, & 389 Glider

    FIBERTECH

    $1,336.99
    Peterbilt Flat Panel Day Cab Conversion Kit* High Quality Flat Panel Conversion Kit* Includes:  - One-piece Fiberglass Panel  - Mounting Hardware  - 3-Piece 6 Inch Fiberglass Cab Extension  - Bonded...
    01-0930034K1
    SKU:
    01-0930034K1
    Product Type:
    Exterior
    Material Options:
    Fiberglass
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $1,336.99
    Qty in Cart: 0
    Price:
    $1,336.99
    Subtotal:
  • Fibertech Cab Flat Panel Basic Conversion Kit For Peterbilt 378, 379, 386, 388, 389

    Fibertech Cab Flat Panel Basic Conversion Kit For Peterbilt 378, 379, 386, 388, 389

    FIBERTECH

    $1,380.99
    Peterbilt Day Cab Flat Panel Basic Conversion Kit* High Quality Flat Panel Basic Conversion Kit * Includes:  - 1 Piece Fiberglass Panel  - Bonded 1 Inch X 2 Inch Aluminum Bracing  - Fiberglass...
    01-0930025K1
    SKU:
    01-0930025K1
    Product Type:
    Exterior
    $1,380.99
    Qty in Cart: 0
    Price:
    $1,380.99
    Subtotal:
  • Fibertech 6 Inch Day Cab Extended Basic Conversion Kit For Peterbilt 378, 379, 386, 388, 389

    Fibertech 6 Inch Day Cab Extended Basic Conversion Kit For Peterbilt 378, 379, 386, 388, 389

    FIBERTECH

    $2,585.99
    Peterbilt Day Cab Extended Basic Conversion Kit* High Quality Extended Basic Conversion Kit* Includes:  - 3-Piece 6 Inch Fiberglass Cab Extension  - Bonded 1 Inch X 2 Inch Aluminum Bracing  -...
    01-0930030K1
    SKU:
    01-0930030K1
    Product Type:
    Exterior
    Ready To Ship:
    Yes
    $2,585.99
    Qty in Cart: 0
    Price:
    $2,585.99
    Subtotal:
  • Fibertech Day Cab Extended Complete Conversion Kit With Tan Interior For Kenworth T660, T800, W900B, W900L

    Fibertech Day Cab Extended Complete Conversion Kit With Tan Interior For Kenworth T660, T800, W900B, W900L

    FIBERTECH

    $4,692.99
    Day Cab Extended Complete Conversion Kit* High Quality Extended Conversion Kit* Includes:  - One-piece 6 Inch Cab Extension  - Bonded 1 Inch x 2 Inch Aluminum Bracing  - Aluminum Upper Cab/Seat Belt...
    02-0930003
    SKU:
    02-0930003
    Truck Class:
    Heavy Duty
    Material Options:
    Fiberglass
    Product Type:
    Exterior
    Make:
    Kenworth
    Ready To Ship:
    Yes
    $4,692.99
    Qty in Cart: 0
    Price:
    $4,692.99
    Subtotal:
  • Fibertech Day Cab Extended Complete Conversion Kit With Light Gray Interior For Kenworth T660, T800, W900B, W900L

    Fibertech Day Cab Extended Complete Conversion Kit With Light Gray Interior For Kenworth T660, T800, W900B, W900L

    FIBERTECH

    $4,692.99
    Day Cab Extended Complete Conversion Kit* High Quality Extended Conversion Kit* Includes:  - One-piece 6 Inch Cab Extension  - Bonded 1 Inch x 2 Inch Aluminum Bracing  - Aluminum Upper Cab/Seat Belt...
    02-0930002
    SKU:
    02-0930002
    Product Type:
    Exterior
    Truck Class:
    Heavy Duty
    Material Options:
    Fiberglass
    Make:
    Kenworth
    Ready To Ship:
    Yes
    $4,692.99
    Qty in Cart: 0
    Price:
    $4,692.99
    Subtotal:
  • Fibertech Day Cab Extended Complete Conversion Kit With Dark Gray Interior For Kenworth T660, T800, W900B, W900L

    Fibertech Day Cab Extended Complete Conversion Kit With Dark Gray Interior For Kenworth T660, T800, W900B, W900L

    FIBERTECH

    $4,692.99
    Day Cab Extended Complete Conversion Kit* High Quality Extended Conversion Kit* Includes:  - One-piece 6 Inch Cab Extension  - Bonded 1 Inch x 2 Inch Aluminum Bracing  - Aluminum Upper Cab/Seat Belt...
    02-0930001
    SKU:
    02-0930001
    Material Options:
    Fiberglass
    Product Type:
    Exterior
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Ready To Ship:
    Yes
    $4,692.99
    Qty in Cart: 0
    Price:
    $4,692.99
    Subtotal:
  • Fibertech Day Cab Extended Complete Conversion Kit With Tan Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab

    Fibertech Day Cab Extended Complete Conversion Kit With Tan Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab

    FIBERTECH

    $3,889.99
    Day Cab Extended Complete Conversion Kit* High Quality Extended Conversion Kit* Includes:  - 3 Piece 6 Inch Fiberglass Cab Extension  - Bonded 1 Inch x 2 Inch Aluminum Bracing  - Fiberglass Interior...
    01-0930040
    SKU:
    01-0930040
    Material Options:
    Fiberglass
    Truck Class:
    Heavy Duty
    Product Type:
    Exterior
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $3,889.99
    Qty in Cart: 0
    Price:
    $3,889.99
    Subtotal:
  • Fibertech Day Cab Extended Complete Conversion Kit With Light Gray Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab

    Fibertech Day Cab Extended Complete Conversion Kit With Light Gray Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab

    FIBERTECH

    $3,889.99
    Day Cab Extended Complete Conversion Kit* High Quality Extended Conversion Kit* Includes:  - 3 Piece 6 Inch Fiberglass Cab Extension  - Bonded 1 Inch x 2 Inch Aluminum Bracing  - Fiberglass Interior...
    01-0930039
    SKU:
    01-0930039
    Product Type:
    Exterior
    Material Options:
    Fiberglass
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $3,889.99
    Qty in Cart: 0
    Price:
    $3,889.99
    Subtotal:
  • Fibertech Day Cab Extended Complete Conversion Kit With Black Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab

    Fibertech Day Cab Extended Complete Conversion Kit With Black Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab

    FIBERTECH

    $3,889.99
    Day Cab Extended Complete Conversion Kit* High Quality Extended Conversion Kit* Includes:  - 3 Piece 6 Inch Fiberglass Cab Extension  - Bonded 1 Inch x 2 Inch Aluminum Bracing  - Fiberglass Interior...
    01-0930038
    SKU:
    01-0930038
    Material Options:
    Fiberglass
    Truck Class:
    Heavy Duty
    Product Type:
    Exterior
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $3,889.99
    Qty in Cart: 0
    Price:
    $3,889.99
    Subtotal:
  • Day Cab Flat Panel Complete Conversion Kit With Dark Gray Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab

    Day Cab Flat Panel Complete Conversion Kit With Dark Gray Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab

    FIBERTECH

    $2,456.99
    Peterbilt Ultra Cab Flat Panel Day Cab Kit Complete Conversion Kit* High Quality Flat Panel Conversion Kit* Includes:  - One-piece Fiberglass Panel  - Bonded 1 Inch x 2 Inch Aluminum Bracing  -...
    01-0930035
    SKU:
    01-0930035
    Truck Class:
    Heavy Duty
    Material Options:
    Fiberglass
    Product Type:
    Exterior
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $2,456.99
    Qty in Cart: 0
    Price:
    $2,456.99
    Subtotal:
  • Total: items /

Adding your products to cart

Frequently Asked Questions About Day Cab Conversion

What is a day cab conversion kit and why would I need one?

A day cab conversion kit is used when a sleeper cab is removed from a truck and replaced with a shorter day cab, or when the sleeper itself is removed to shorten the truck's overall length. The kit typically includes back-of-cab panels, fairings, and related trim pieces that close off the gap left behind, giving the truck a clean, finished appearance and helping maintain proper airflow around the cab.

Will a conversion kit fit my specific make and model of truck?

Fitment varies by truck make, model, and cab configuration, so it's important to confirm the exact year and model of your truck before ordering. Because these kits are designed to match the contours of specific cab styles, using the wrong kit can result in gaps, poor panel alignment, or additional fabrication work. If you're unsure about fitment, check the product listing details or reach out to our team for confirmation before purchasing.

What materials are these panels and fairings made from, and how durable are they?

Day cab conversion components are commonly made from fiberglass or aluminum, depending on the manufacturer and specific part. Fiberglass panels are lightweight and can be molded to match factory cab contours, while aluminum options tend to offer added durability and resistance to cracking. Either material can be painted or finished to match your truck once installed.

Do these kits come pre-painted, or will I need to paint them myself?

Most day cab conversion panels and fairings are sold unpainted or in a primer finish, allowing you to match the panel to your truck's specific paint color. Painting is typically done after installation to ensure proper fit and alignment, and it's worth budgeting for this additional step when planning your conversion project.

Is professional installation required, or can this be done as a DIY project?

Installation complexity depends on the scope of the conversion. Simple panel or fairing replacements can often be handled by an experienced DIYer with basic bodywork tools, while full sleeper-to-day-cab conversions that involve structural changes, wiring, or exhaust rerouting are best handled by a professional shop familiar with this type of work. If your project goes beyond replacing an existing panel, we recommend consulting a qualified technician to ensure everything is properly aligned and sealed.


Introducing the Official 4 State Trucks Mobile App – Gear Up On the Go!