Shop Peterbilt 357 & 378 Deck Plates & Air Line Boxes

Peterbilt 357/378 Deck Plates & Air Line Boxes

Peterbilt 357/378 Deck Plates & Air Line Boxes: Sturdy, Reliable, and Versatile Solutions for Your Truck Needs Whether you're looking to upgrade the appearance and functionality of your Peterbilt 357 or 378 truck, our comprehensive selection of deck plates and air line boxes has you covered. Crafted from high-quality materials like stainless steel and aluminum, these products are built to withstand the demands of life on the road. Deck plates provide a durable, slip-resistant surface for your truck's bed, offering both aesthetic and practical benefits. Choose from a range of sizes and finishes, including diamond plate and smooth options, to complement the style of your Peterbilt. Our air line boxes, meanwhile, provide secure and convenient storage for your trailer air and electrical connections, keeping them organized and easily accessible. Whether you're looking to upgrade your rig's appearance, improve its functionality, or both, our Peterbilt 357/378 deck plates and air line boxes are the perfect solution. With a focus on quality, durability, and versatility, these products are designed to meet the needs of even the most discerning truck owners and operators.

Frequently Asked Questions About Peterbilt 357/378 Deck Plates & Air Line Boxes

What years and models are these deck plates compatible with?

Our deck plates and air line boxes are specifically designed for Peterbilt 357 and 378 models manufactured from 1987 through 2007. These parts are direct replacements for the original equipment on both standard and extended hood configurations. If you have a different year or are unsure about compatibility, please contact our support team with your VIN number for verification.

Are these deck plates made from stainless steel or aluminum, and how thick is the material?

We offer deck plates in both 304 stainless steel and aluminum options. The stainless steel plates are typically 14-gauge (approximately 0.075 inches thick), providing excellent durability and corrosion resistance. Aluminum options are usually 0.090 inches thick to ensure comparable strength while keeping weight down. Both materials are designed to withstand heavy-duty trucking conditions and resist rust, road salt, and weather damage.

Do I need to drill new holes or modify my truck to install these deck plates?

Most of our deck plates are designed as direct bolt-on replacements using your existing mounting holes. No drilling or modifications are typically required for standard installations. However, some custom or aftermarket bumpers may require minor adjustments. Each product includes detailed mounting instructions, and installation usually takes 30-45 minutes with basic hand tools. We recommend test-fitting before final installation to ensure proper alignment.

What finish options are available, and will they match my truck's existing chrome?

We offer three primary finishes: mirror-polished stainless steel, brushed stainless steel, and powder-coated options in various colors. The mirror-polished stainless provides the closest match to OEM chrome bumpers and maintains its shine with minimal maintenance. Brushed finishes offer a more subtle, professional appearance that hides minor scratches better. All finishes are designed to complement both chrome and painted bumpers commonly found on 357/378 models.

Can I mount additional accessories like light bars or air horns to these deck plates?

Yes, many of our deck plates come pre-drilled with standard accessory mounting points, typically featuring 3/4-inch holes spaced for common light brackets and air horn mounts. The reinforced construction supports most standard truck accessories without flexing or vibration. For custom installations, the material can be safely drilled using standard metal bits, though we recommend using a center punch and cutting fluid for best results.