Custom Semi Box | Custom Semi Accessories | Highway Products Inc. Skip to content

Custom Semi Box

Custom Semi Box

Design an underbody box exactly to your specs

Custom Semi Box

Lifetime Warranty

Customize your next Semi Underbody Box, and make it perfect for you.

  • Work with a custom specialist to bring your idea to life
  •  An Engineer dedicated to your project will create a 3D Model
  • Review and approve the design before production
  • Only the best materials and components will be used
  • American Made
  • Built to Last Forever
Lifetime Warranty

Highway Products is best known for our million-mile semi boxes. Even an underbody box that is customized for you will still stand up to the longest hauls.

WHY AN HPI™ Custom Semi Box

Have our engineers design your Underbody Box with the exact measurements you need with the door configuration that works best for you

WHY AN HPI™ Custom Semi Box

Have our engineers design your Underbody Box with the exact measurements you need with the door configuration that works best for you

Add drawers, dividers, bulkheads, shelves, trays, chain hangers and more. Save time every day.

Enhance the appearance of your Under Body Box by choosing from a variety of finishes and custom colors.

Work with our custom product specialists and engineers to come up with a design that is perfect for you.

Over-engineered and over-built is the only way we do it. No shortcuts taken anywhere, from thick gauge premium aluminum to the best components we can source.

Everything built at Highway Products comes with our Lifetime Warranty

Checkout some photos and videos of Custom Semi Box.