Peterbilt 387 Tool & Battery Boxes

Frequently Asked Questions About Peterbilt 387 Tool & Battery Boxes

Will a tool or battery box made for the Peterbilt 387 fit my truck without modification?

Most tool and battery boxes in this category are designed to match the frame rail spacing, step configuration, and mounting points found on the Peterbilt 387. However, fit can vary slightly depending on your truck's frame width, existing fuel tank setup, and whether you have factory or aftermarket brackets already installed. We recommend checking the listed dimensions and mounting specs against your truck before ordering, and reaching out to our team if you're unsure about compatibility with your specific configuration.

What materials are these boxes made from, and which one should I choose?

Tool and battery boxes are typically available in aluminum, steel, or stainless steel. Aluminum is lightweight and naturally resists rust, making it a popular choice for reducing overall truck weight. Steel offers added durability and impact resistance but is heavier and may require more upkeep to prevent corrosion. Stainless steel provides a balance of strength and corrosion resistance with a polished look, often at a higher price point. Your choice usually comes down to how much weight savings matters to you versus long-term durability and appearance.

Do these boxes come with mounting hardware and brackets included?

This varies by manufacturer and specific product listing. Some boxes include the necessary brackets, straps, and hardware for installation, while others are sold as the box only, requiring separate purchase of mounting kits. Always check the product description or contact us before ordering if you want to confirm exactly what's included so you're not caught short on installation day.

How much weight can these tool and battery boxes hold, and will it affect my truck's capacity?

Weight capacity depends on the specific box, its material, and how it's mounted, so it's important to check the manufacturer's listed capacity before loading it up with tools, chains, or batteries. Keep in mind that anything you add to your truck, including the box itself and its contents, counts toward your overall GVWR, so heavier steel boxes loaded with equipment can add up quickly if you're already running close to your weight limits.

Can I install a tool or battery box myself, or should I have a shop do it?

Many owner-operators install these boxes themselves, especially if the box is a direct bolt-on replacement using existing mounting points. Installation generally involves securing brackets to the frame rail and attaching the box, sometimes with additional support for battery boxes carrying significant weight. If your setup requires drilling, frame modifications, or rewiring for battery access, having a qualified shop handle the install can help ensure everything is secure and safe for the road.