Frequently Asked Questions About Kenworth T300-T450 Deck Plates & Air Line Boxes

What years and models are these deck plates compatible with?

Our deck plates and air line boxes are designed specifically for Kenworth T300, T330, T370, T400, and T450 models from 1997 through current production years. However, there were minor mounting changes in 2008 and 2013 model years. When ordering, please verify your truck's exact year and check if it has the standard 3-hole or 4-hole mounting pattern. If you're unsure, measure the distance between your existing mounting holes or contact us with your VIN for verification.

Are these deck plates made from stainless steel or chrome-plated steel?

We carry both options to meet different needs and budgets. Our stainless steel deck plates are 304-grade stainless with a mirror polish finish that resists rust and corrosion without any coating. The chrome-plated versions feature heavy-gauge steel with triple-chrome plating. While chrome offers excellent initial shine, stainless steel provides superior long-term durability, especially in harsh weather conditions or areas using road salt. Stainless typically costs 30-40% more but requires less maintenance over time.

Do I need to drill new holes or modify my bumper for installation?

Most installations use existing factory mounting points and require no drilling. Standard deck plates mount using the original bumper bolt holes with the included hardware. However, if you're adding air line boxes to a truck that didn't originally have them, you may need to drill 2-4 mounting holes depending on the style. We recommend using a step drill bit and applying rust prevention coating to any new holes. Installation typically takes 30-45 minutes per side with basic hand tools.

What's the difference between standard and deluxe air line box styles?

Standard air line boxes feature a basic rectangular design with a spring-loaded door and accommodate one glad hand connection per box. Deluxe models include a larger storage compartment, reinforced hinges, better weather sealing, and can house both service and emergency glad hands in a single unit. Deluxe boxes also typically feature LED marker lights and upgraded latches. While standard boxes work well for basic applications, deluxe models are preferred for severe-duty use or when appearance is a priority.

Will aftermarket deck plates affect my bumper warranty or DOT compliance?

Properly installed deck plates and air line boxes that meet OEM specifications will not void your bumper warranty or create DOT compliance issues. Our products maintain required ground clearance and don't obstruct lights or reflectors. However, ensure any LED lights in deluxe models are DOT-approved and properly wired to your truck's electrical system. Keep installation documentation and receipts as some dealers may request proof that approved parts were used.