Peterbilt 357/378 Cab & Related

Frequently Asked Questions About Peterbilt 357/378 Cab & Related

What years and models are compatible with your Peterbilt 357/378 cab parts?

Our cab parts are designed to fit Peterbilt 357 models from 1987-2007 and Peterbilt 378 models from 1986-2007. However, some components may have specific year breaks - for example, door panels changed design in 1996, and mirror mounting brackets differ between pre-2000 and post-2000 models. Always check the product description for exact year compatibility or contact our team with your VIN for verification.

Are your cab corners and rocker panels made from the same gauge steel as OEM parts?

Yes, our replacement cab corners and rocker panels are manufactured from 16-gauge steel, matching OEM specifications. They feature the same stamping patterns and mounting points as factory parts. All steel components come with a primer coating to prevent rust during shipping and storage, but will require proper prep work and painting before installation.

What tools and skills are needed to install cab doors or replace door shells?

Door replacement requires basic hand tools including socket sets, drill bits, and a rivet gun for some models. You'll need to transfer components like window regulators, latches, and mirrors from your old door. Most experienced mechanics can complete a door swap in 2-3 hours per side. Door alignment is critical - we recommend having shims and adjustment tools ready. Professional installation is suggested if you're not comfortable with bodywork.

Do you offer both painted and chrome options for exterior cab trim?

We stock multiple finish options depending on the specific part. Mirror brackets and sun visors are available in chrome, stainless steel, and painted finishes. Grab handles come in chrome and black powder coat. Door handles are offered in chrome and polished aluminum. Check individual product listings for available finishes, as not all options are available for every component.

Will aftermarket cab glass and weatherstripping seal as well as original parts?

Our replacement glass meets DOT standards and uses the same thickness specifications as OEM (typically 1/4" for door glass and 5/16" for windshields). Weatherstripping is made from EPDM rubber that matches factory durometer ratings for proper compression and sealing. For best results, clean all mounting surfaces thoroughly and use appropriate adhesives where specified. Many customers report equal or better sealing compared to worn factory weatherstripping.