Peterbilt 357/378 Exterior Parts
Maximize the performance of your Peterbilt 357/378 with our assortment of cab panels, fairings, replacement mirrors, and sleeper options
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On Sale
Day Cab Flat Panel Complete Conversion Kit With Tan Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab
FIBERTECH
Now: $2,210.39Was: $2,455.99Day Cab Flat Panel Complete Conversion Kit * High Quality Flat Panel Conversion Kit* Includes:- One-piece Fiberglass Panel- Bonded 1 Inch x 2 Inch Aluminum Bracing- Fiberglass Interior Window Trim- 19 Inch x 36 Inch Rear Window Glass- Window Seal And...Now: $2,210.39Was: $2,455.99 -
On Sale
Day Cab Flat Panel Complete Conversion Kit With Dark Gray Interior For Peterbilt 378, 379, 386, 388, 389 Regular Cab
FIBERTECH
Now: $2,211.29Was: $2,456.99Peterbilt 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- Fiberglass Interior Window Trim- 19 Inch x 36 Inch Rear Window...Now: $2,211.29Was: $2,456.99 -
On Sale
Peterbilt 378, 379, 386, 388, 389 Basic Flat Panel Day Cab Conversion Kit
FIBERTECH
Now: $1,030.49Was: $1,144.99Peterbilt Ultra Cab Basic Flat Panel Day Cab Conversion KitThis Day Cab Flat Panel Basic Conversion Kit is a convenient solution for converting select Peterbilt 378, 379, 386, 388, 389 models into day cabs. This aftermarket kit includes a one-piece...Now: $1,030.49Was: $1,144.99 -
On Sale
Day Cab Extended Panel Complete Conversion Kit With Tan Interior For Peterbilt 378, 379, 386, 388, 389 Ultra Cab
FIBERTECH
Now: $3,095.99Was: $3,439.99Peterbilt Ultra Cab Day Cab Conversion Kit * High Quality Extended Panel Conversion Kit* Includes:- 3 Piece 6 Inch Fiberglass Cab Extension- Bonded 1 Inch X 2 Inch Aluminum Bracing- Fiberglass Interior Window Trim- 19 Inch x 36 Inch Rear Window Glass-...Now: $3,095.99Was: $3,439.99 -
On Sale
Day Cab Extended Panel Complete Conversion Kit With Light Gray Interior For Peterbilt 378, 379, 386, 388, 389 Ultra Cab
FIBERTECH
Now: $3,095.99Was: $3,439.99Peterbilt Ultra Cab Day Cab Conversion Kit * High Quality Extended Panel Conversion Kit* Includes:- 3 Piece 6 Inch Fiberglass Cab Extension- Bonded 1 Inch X 2 Inch Aluminum Bracing- Fiberglass Interior Window Trim- 19 Inch x 36 Inch Rear Window Glass-...Now: $3,095.99Was: $3,439.99 -
On Sale
Day Cab Extended Panel Complete Conversion Kit With Dark Gray Interior For Peterbilt 378, 379, 386, 388, 389 Ultra Cab
FIBERTECH
Now: $3,095.99Was: $3,439.99Peterbilt Ultra Cab Day Cab Conversion Kit * High Quality Extended Panel Conversion Kit* Includes:- 3 Piece 6 Inch Fiberglass Cab Extension- Bonded 1 Inch X 2 Inch Aluminum Bracing- Fiberglass Interior Window Trim- 19 Inch x 36 Inch Rear Window Glass-...Now: $3,095.99Was: $3,439.99 -
On Sale
Peterbilt 378, 379, 386, 388, & 389 Day Cab Extended Basic Conversion Kit
FIBERTECH
Now: $1,910.69Was: $2,122.99Peterbilt 378, 379, 386, 388, & 389 Day Cab Extended Basic Conversion KitThis Day Cab Extended Basic Conversion Kit is for Peterbilt trucks and adds 4 inches of legroom with a 6-inch fiberglass extension. It has a strong aluminum sub-structure and is...Now: $1,910.69Was: $2,122.99 -
On Sale
Day Cab Flat Panel Complete Conversion Kit With Tan Interior For Peterbilt 378, 379, 386, 388, 389 Ultra Cab
FIBERTECH
Now: $1,967.39Was: $2,185.99Peterbilt 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 - Fiberglass Interior Window Glass- Window Seal And Lockbead -...Now: $1,967.39Was: $2,185.99 -
On Sale
Day Cab Flat Panel Complete Conversion Kit With Light Gray Interior For Peterbilt 378, 379, 386, 388, 389 Ultra Cab
FIBERTECH
Now: $1,967.39Was: $2,185.99Peterbilt 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 - Fiberglass Interior Window Glass- Window Seal And Lockbead -...Now: $1,967.39Was: $2,185.99 -
On Sale
Day Cab Flat Panel Complete Conversion Kit With Dark Gray Interior For Peterbilt 378, 379, 386, 388, 389 Ultra Cab
FIBERTECH
Now: $1,967.39Was: $2,185.99Peterbilt 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 - Fiberglass Interior Window Glass- Window Seal And Lockbead -...Now: $1,967.39Was: $2,185.99 -
On Sale
Day Cab Flat Panel Complete Conversion Kit With Black Interior For Peterbilt 378, 379, 386, 388, 389 Ultra Cab
FIBERTECH
Now: $1,967.39Was: $2,185.99Peterbilt 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 - Fiberglass Interior Window Glass- Window Seal And Lockbead -...Now: $1,967.39Was: $2,185.99 -
On Sale
Peterbilt 378, 379, 386, 388, & 389 Day Cab Flat Panel Basic Conversion Kit
FIBERTECH
Now: $1,058.39Was: $1,175.99Peterbilt 378, 379, 386, 388 & 389 Day Cab Flat Panel Basic Conversion KitThis Day Cab Flat Panel Basic Conversion Kit allows you to convert the sleeper cab of your Peterbilt truck into a day cab. It's compatible with models 378, 379, 386, 388, 389, and...Now: $1,058.39Was: $1,175.99