Exterior Components› Truck Bed and Trunk Components

RKI

ALUM UNDERBODY 48X18X18 BLK

$799.76

SKU: R01R H481818AB

In Stock
In Stock
Ships by Oct 7
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The RKI H481818AB is a premium underbody truck tool box designed to optimize space and organization while providing secure, weather-resistant storage for your tools and equipment. This 48-inch aluminum underbody box is part of RKI's H-Series line, featuring durable construction and professional-grade features ideal for commercial trucks, service vehicles, pickups, and trailers.

The box is constructed from .100 bright diamond treadplate aluminum with an inner stiffener of .080 smooth aluminum, and features a black powder coat finish for corrosion resistance. It has full arc welds throughout for maximum strength and durability. Security is provided by a full-size stainless steel paddle handle rotary latch, and heavy-duty machine chains hold the door in the open position.
Show original supplier description
ALUM UNDERBODY 48X18X18 BLK

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRKI
Part NumberR01R H481818AB
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy