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Wehrli 3/8-inch billet front bumper spacer pair
GM Sierra HD with Wehrli front bumper spacers installed
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Wehrli 3/8-Inch Front Bumper Spacers for 2020-2026 GM HD

$ 147.00 $ 138.56
$ 138.56

Create front-tire clearance without trimming the factory bumper

The Wehrli WCF100446 is built for the verified application below and gives buyers a clearly defined configuration, finish, and installation scope before ordering.

Key Features

  • Moves the factory front bumper forward 3/8 inch
  • CNC-machined billet aluminum construction
  • Flat black powder coat for corrosion resistance and an OEM-like appearance
  • Maintains broad contact at the frame-horn mounting points
  • Supports wider or taller tires and more negative wheel offset
  • Uses the factory bumper mounting hardware and installs with basic hand tools
  • The exact configuration in this listing is identified by WCF100446

Fitment

Years Make Model Required configuration
2020 - 2026 Chevrolet Silverado 2500 HD Wehrli WCF100446, 3/8-inch (0.375-inch) front bumper spacer kit. Manufacturer lists gas and diesel 2500HD/3500HD trucks. Requires the factory front-bumper/frame-horn mounting interface and factory mounting hardware. Moves the front bumper forward; check the actual wheel/tire and suspension clearance. This is the 3/8-inch kit, not the separate 3/4-inch WCF100444 kit. Aftermarket bumper interfaces require separate confirmation.
2020 - 2026 Chevrolet Silverado 3500 HD Wehrli WCF100446, 3/8-inch (0.375-inch) front bumper spacer kit. Manufacturer lists gas and diesel 2500HD/3500HD trucks. Requires the factory front-bumper/frame-horn mounting interface and factory mounting hardware. Moves the front bumper forward; check the actual wheel/tire and suspension clearance. This is the 3/8-inch kit, not the separate 3/4-inch WCF100444 kit. Aftermarket bumper interfaces require separate confirmation.
2020 - 2026 GMC Sierra 2500 HD Wehrli WCF100446, 3/8-inch (0.375-inch) front bumper spacer kit. Manufacturer lists gas and diesel 2500HD/3500HD trucks. Requires the factory front-bumper/frame-horn mounting interface and factory mounting hardware. Moves the front bumper forward; check the actual wheel/tire and suspension clearance. This is the 3/8-inch kit, not the separate 3/4-inch WCF100444 kit. Aftermarket bumper interfaces require separate confirmation.
2020 - 2026 GMC Sierra 3500 HD Wehrli WCF100446, 3/8-inch (0.375-inch) front bumper spacer kit. Manufacturer lists gas and diesel 2500HD/3500HD trucks. Requires the factory front-bumper/frame-horn mounting interface and factory mounting hardware. Moves the front bumper forward; check the actual wheel/tire and suspension clearance. This is the 3/8-inch kit, not the separate 3/4-inch WCF100444 kit. Aftermarket bumper interfaces require separate confirmation.

2020-2026 Chevrolet Silverado 2500 HD and 3500 HD and GMC Sierra 2500 HD and 3500 HD, including gas and diesel models. The spacers move the factory front bumper forward 3/8 inch to increase tire clearance.

Specifications

Detail Value
Manufacturer Part Number WCF100446
Application 2020-2026 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD
Powertrain Gas and diesel
Spacer Thickness 3/8 inch (0.375 inch)
Material CNC-machined billet aluminum
Finish Flat black powder coat
Hardware Reuses factory mounting hardware
Manufacturer Availability In stock with a stated 3-5 business-day lead time

What's Included

  • Two 3/8-inch billet aluminum front bumper spacers
  • Factory mounting hardware is reused and is not included
  • Package identity is WCF100446

About Wehrli

Wehrli Custom Fabrication designs and manufactures diesel-truck cooling, engine-bay, chassis, and exterior components in the United States, with application and configuration details published for each part.

Related Parts

  • The 3/4-inch Wehrli spacer kit for more aggressive wheel and tire fitments
  • Wheel and tire packages verified for the truck's load rating and available clearance
  • Alignment and clearance inspection after wheel, tire, or suspension changes

FAQ

What is the WCF100446?

3/8-inch Front Bumper Spacer Kit is the exact Wehrli product described in this listing.

How far do these spacers move the bumper?

They move the factory front bumper forward 3/8 inch.

Do they fit gas and diesel HD trucks?

Yes. Wehrli lists both gas and diesel 2500 HD and 3500 HD applications for the stated years.

What are the spacers made from?

They are CNC-machined from billet aluminum and finished in flat black powder coat.

Is new mounting hardware included?

No. The 3/8-inch kit is designed to reuse the factory bumper mounting hardware.

Will these eliminate every tire rub?

No. They add front-bumper clearance, but final clearance still depends on tire size, wheel offset, suspension height, alignment, and vehicle configuration.

Do the factory bumper and valance need trimming?

The kit is designed to reduce or avoid trimming for many combinations, but every wheel and tire setup must be checked through full steering and suspension travel.

Is professional installation required?

Installation uses basic hand tools, but the bumper must be supported and all factory fasteners must be tightened to the current vehicle specification.

Installation Instructions

  1. Confirm the package label shows WCF100446 and that the truck matches the fitment table.
  2. Read the current Wehrli and vehicle service instructions before disassembly.
  3. Support the front bumper before loosening its frame-horn mounting hardware.
  4. Position the spacer pair evenly and verify the bumper remains level with surrounding body panels.
  5. Check tire clearance at full steering lock and through available suspension travel before road use.
  6. Reinspect the completed installation before road use and after the initial service interval.

California Proposition 65 Warning: Cancer and reproductive harm. See www.P65Warnings.ca.gov.

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