XO.SKLTN Topper Panel Add-On Kit - Chevrolet Silverado/GMC Sierra 2500HD/3500HD

Name: XO.SKLTN Topper Panel Add-On Kit - Chevrolet Silverado/GMC Sierra 2500HD/3500HD
Brand: Xtrusion Overland
SKU: SKL-TPK-SIHD-A-580W-130H-718L
Availability: InStock

$1,900.00 USD

This is an add-on to the XO.SKLTN Bed Rack. You must select the same size and model for a proper fit.

Model

Bed Rack Height

Xtrusion Overland | SKU: SKL-TPK-SIHD-A-580W-130H-718L

Lead Times

Current Lead Times:

Please Note That All Lead Times Are Estimations*

XO.SKLTN | 10-12 weeks
XTR1, XTR3 & XBRS Bed Racks | 4-7 weeks
Extrusion Sub-Structures | 3-4 weeks
Xtrusion Branded Accessories | 1-2 weeks

Our posted lead times are only estimations and rely on various factors, many times outside of our control. Historic challenging times within our industry have caused ripples in the supply chain world that have repercussions even on the smallest of components at times. As you would imagine, many companies in our industry are experiencing the same.

Our bed racks are super cool, with the ability to be customized. But this causes a series of challenges due to the thousands of possible combinations regarding compatibility, availability, etc. However, we are constantly aiming at improving our processes, hiring and training our people to achieve a reliable fulfillment process.

If you have additional questions about our lead times, please check our current estimations and reach out to our team if you need additional information. We thank you for your continued support and patience as we improve our processes.

While we would do our best to accommodate a specific need, please do not plan any trips or outings based on the estimated lead times.

THIRD PARTY PRODUCTS

Xtrusion Overland started supplying various brands that go hand in hand with our own products, to provide a complete service and help us grow. This includes products that are drop shipped. Please be advised that availability and lead times of those product are solely impacted by the third-party vendor's schedule. Many products are sold under an open inventory method, as the technology to sync inventories is limited, therefore please reach out if a specific product is needed by a specific date for us to double check with the supplier for you!

Any potential delay that occurs in the sourcing, processing, or drop shipment at the third party level will be communicated to the best of our ability to the customer.

ESTIMATED DATE | LEAD TIMES

The estimated lead time provided when you placed your order is JUST AN ESTIMATE. It is not a guarantee that the product will be shipped on that date. The estimated lead time gives you some sense of what the current times to source, cut, pack and ship takes. Many times the lead time can be shorter, but likewise it can extend, depending on factors such as previous demand and current supply. We manufacture many components in house, but extenuating circumstances such as down time for maintenance or unscheduled downtimes for repairs might impact dates as well as delays related to our sourced components. There is a constant flow of parts and shipments, and sometimes the visibility becomes a challenge to pinpoint exactly when your product will ship.

Feel free to check on your order at any time. Be aware that our customer service team may not be able to give you an exact date for completion but rest assured we are tracking your order and it will be built in the order that it was received.

Xtrusion Overland also reserves the right to cancel items from an order, offer an alternative substitution or issue refund accordingly when product is delayed at an unacceptable time frame or at the request of the customer.

Rack Angle Guide

Overland Rack Angle Compatibility

One Angle.
Every Build.

XTR bed racks use three rack angles — 9°, 13°, and 20° — each matched to specific vehicle setups and accessory families. Find the right angle for your build so every rail, crossbar, and mounting kit lines up perfectly.

Engineered quality

CNC billet strength

We didn't just join the strong extrusions with some sheet metal corner brackets — we put the aluminum where it makes a difference. Every angle variant uses the same 6061-T6 Aerospace grade billet, machined to precision to join all components with exact angular alignment.

✓ All three angles share the same billet standard
✓ 9°, 13°, and 20° brackets machined to exact specs
✓ No sheet metal corners — pure aerospace aluminum

CNC billet corner brackets for XTR bed racks — available in 9°, 13°, and 20° angles

Quick Reference

Angle Compatibility

Rack Angle	Product Line	Compatible Accessories
9°	Gladiator Series	All Gladiator bedracks, Gladiator mounting kits, Gladiator-specific crossbars, including Softopper versions on Gladiator.
13°	Soft Topper Series	Soft Topper bed racks for all truck models (except Gladiator).
20°	Universal / Crossbars	All XTR1, XTR3, XBRS Bed Racks, universal mounting rails, standard rack accessories (except Gladiator or Softopper)

9° angle

Gladiator Series

The 9° angle is dedicated to the Gladiator product line. This angle was engineered specifically for Gladiator rails and their mounting geometry, ensuring a flush, secure connection between your rails and any Xtrusion add-on accessories. This includes Softopper Gladiator Builds

Xo Skeleton Note: The XO.SKLTN Uses a complete different system not to be confused with Gladiator XTR 9 Degree components.

13° angle

Soft Topper Series

The 13° angle serves Soft Topper products. This intermediate angle provides the right compromise between load clearance and low profile when mounting accessories to Soft Topper rails and their compatible hardware.

Crossbars: XTR1 and XTR3 use 13° when mounted on Soft Topper setups.

20-degree universal rack crossbar — XTR universal and crossbar series

20° angle

Universal / Crossbars

The 20° angle is the default for all other Xtrusion products — universal mounting rails, standard crossbars, and general overland rack accessories. This is the most common angle in the industry and works with the widest range of roof rack and truck bed rack systems.

Exception: XBRS Crossbars use 9 Degree components, in case you decide to upgrade to full rack, so it remains compatible on joints.

Quick Reference

Xo Skeleton — Angle Breakdown

The Xo Skeleton uses two angles Gladiator Specific or Universal. However, some accessories might be compatible with both, because the top rail consolidates both angles into one. Crossbar mounts or awning mounts are compatible with both versions.

9° Angle

XOSKLTN Gladiator

Gladiator rail mounts
Gladiator-specific hardware
Gladiator crossbar slots

13° Angle

XOSKLTN

Soft Topper rail mounts
Soft Topper mounting kits
Soft Topper crossbar slots

Note: The Xo Skeleton never uses the 20° angle.

How To Choose

The Right Rack Angle,
Explained

Every XTR accessory — crossbars, mounting brackets, add-on hardware — is cut for one specific angle. The right angle depends on your primary rail system or vehicle setup. Choosing the matching angle ensures every component in your build aligns correctly and carries load as designed.

Identify your rail system. Gladiator = 9°, Soft Topper = 13°, universal = 20°.
Check your crossbar type. XTR1/XTR3 come in all three — order the one matching your rails.
Stick to one angle per build. Mixing angles creates misalignment and stress points.

What determines the rack angle I need? +

Your rack angle is determined by your primary rail system or vehicle setup. Gladiator rails use 9°, Soft Topper setups use 13°, and universal or standard rack accessories use 20°. Choosing the matching angle ensures every accessory — crossbars, mounting brackets, and add-ons — aligns correctly.

Can I use a 20° crossbar with a Gladiator rail? +

No. Gladiator rails are engineered for 9° accessories. Using a 20° crossbar on a Gladiator rail will result in misalignment and improper load transfer. Always match your crossbar angle to your rail system.

Do Soft Toppers and Gladiator rails use the same angle? +

No. Soft Toppers use a 13° angle while Gladiator rails use a 9° angle. These angles are not interchangeable. If you're building with both types, you'll need separate angle-specific accessory sets.

Are XTR1 and XTR3 crossbars angle-specific? +

XTR1 and XTR3 crossbars come in three angle variants — 9°, 13°, and 20° — to match each rack system. The 20° variant is the default and works with universal racks. The 13° variant is used when paired with Soft Topper setups. Order the angle that matches your primary rail system.

Why do overland racks use different angles? +

Different rack angles exist to accommodate varying vehicle roof geometries, rail profiles, and load requirements. The 9° angle works well with Gladiator-style tubular rails. The 13° angle provides a middle ground for Soft Topper mounting systems. The 20° angle is the industry standard for universal applications and offers maximum load clearance.

Description

Upgrade your Chevrolet Silverado or GMC Sierra 2500HD/3500HD XO.SKLTN Bed Rack into a more functional enclosed truck topper with the XO.SKLTN Topper Panel Add-On Kit. This kit converts your open XO.SKLTN rack setup into topper mode, giving your heavy-duty truck more covered storage, better gear organization, and easier access for daily driving, work, towing, camping, and overland travel.

Important Fitment Note: This kit is designed for existing XO.SKLTN Bed Racks only. It is not compatible with XTR1 or XTR3 bed racks. Please select the correct Silverado or Sierra 2500HD/3500HD model, bed length, and rack height before ordering.

What This Kit Does

The XO.SKLTN Topper Panel Add-On Kit adds the surrounding panels, roof section, left side door, right side door, rear door, seal surfaces, struts, and locking latches needed to convert your XO.SKLTN Bed Rack into an enclosed topper-style setup.

Instead of leaving gear exposed in the bed, topper mode gives your Silverado or Sierra HD a covered cargo area for tools, recovery gear, camping equipment, luggage, jobsite supplies, storage boxes, towing gear, and everyday carry items while keeping your truck bed more organized and more practical.

Why Enclosed Topper Mode Is More Useful

An enclosed topper makes your heavy-duty truck more useful every day, not just on trail days. The Silverado and Sierra 2500HD/3500HD platforms are often used for work, towing, hauling, road trips, and adventure travel, so having a covered and organized bed space can make the truck much more practical.

Topper mode helps protect gear from direct exposure to rain, snow, dust, mud, road debris, and jobsite conditions while creating a cleaner cargo area for both work and recreation. Whether you are carrying tools during the week, towing a trailer, hauling recovery gear, or packing camping equipment for a weekend trip, an enclosed topper setup gives you more usable storage without giving up the modular XO.SKLTN platform.

The three hinged doors give you access from the driver side, passenger side, and rear of the truck, making it easier to reach your gear without unloading everything from the tailgate. This is especially useful for tool bags, camp kitchens, recovery kits, air systems, drawer systems, storage bins, towing accessories, and gear you want to keep accessible but covered.

Why Aluminum Is Better Than Heavy Steel

The XO.SKLTN system is built around a lightweight aluminum structure, making it a strong alternative to heavy steel topper and rack systems. Even on a heavy-duty truck, weight still matters. A lighter aluminum setup helps preserve payload capacity, handling, fuel economy, suspension life, and long-term drivability.

Aluminum also offers excellent corrosion resistance compared to steel. Steel systems can be strong, but once the coating is scratched, chipped, or worn through, rust can begin to spread and shorten the life of the product. The aluminum XO.SKLTN setup is better suited for long-term outdoor use, wet climates, salted roads, coastal areas, mud, snow, jobsite exposure, and year-round adventure travel.

What’s Included

Surrounding topper panels
Left side hinged door
Right side hinged door
Rear hinged door
Roof section
Seal surfaces
Gas struts
Locking latches

Common Uses

Converting an XO.SKLTN Bed Rack into topper mode
Adding enclosed storage to a Chevy Silverado or GMC Sierra 2500HD/3500HD
Keeping tools, camping gear, towing gear, and recovery equipment covered
Improving everyday cargo storage and organization
Making better use of heavy-duty truck bed space
Accessing gear from the side or rear of the truck
Reducing exposed cargo in rain, snow, dust, mud, and road conditions
Building a lightweight aluminum alternative to heavy steel topper systems
Creating a modular overland topper setup that can grow with your build

Built for Daily Use, Work, and Adventure

This is a practical upgrade for Silverado and Sierra HD owners who want more than a traditional bed rack. The XO.SKLTN Topper Panel Add-On Kit gives your truck the everyday utility of an enclosed topper while keeping the strength, corrosion resistance, modularity, and lightweight benefits of an aluminum Xtrusion Overland system.

Compatible with XO.SKLTN Bed Racks only. Not compatible with XTR1 or XTR3 racks.

Topper Panel Add-On Kit will include all surrounding panels with 3 hinged doors (left, right, rear), roof section, seal surfaces, struts, and locking latches.

*Compatible with XO.SKLTN Bed Racks only. Not compatible with XTR1 or XTR3.

Payment & Security

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