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1985-19 Ford F250/F350 with Sterling 10.25/10.50 - Hi-Tek Diff Cover 41299YouTube Button

B&M Hi-Tek Aluminum Differential Cover for Sterling 10.25/10.5-inch - Black

Sterling 10.25/10.5-inch Differential Cover.

PART# 41299

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$309.00   Suggested Retail
$250.16   Holleydays Price
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Our engineers designed the line of Hi-Tek differential covers to not only look good but address a number of weaknesses of the factory stamped steel covers. First, they started by constructing the covers of thick A356.0-T6 aluminum, which dissipates heat much faster than the factory steel unit keeping the fluid temperature lower under high-stress loads vs. a steel cover. Then for added durability, we added a reinforced center bar for extra strength along with load bolts to help prevent bearing cap deflection under severe loads. The internal shape of the cover retains the smooth round back internally to help keep the fluid flow going over the ring gear to properly lubricate the gears and bearings. Additional features include a magnetic drain plug for catching ferrous metal particles, MIL-Spec (MIL-A-8625) black anodized finish, machined B&M logo, and all necessary hardware and easy to follow detailed instructions for a quick and simple installation you can do at home. Note: Gasket not included.


  • Load Bolts for Additional Support for Bearing Caps
  • Magnetic Drain Plug for Easy Servicing
  • Black MIL-Spec Anodized Finish
  • Over 65 Years of B&M Quality
  • Lifetime Limited Warranty
  • Additional Fluid Capacity
  • Machined B&M Logo
  • Easy Installation


Bolt Count12
Bolt PatternSterling 10.25/10.50
Call Out Size (in)3.57
Carrier Main Cap SupportYes
Color/FinishBlack Anodized
Drain Plug IncludedYes
Emission Code5
Filler Plug IncludedYes
Gasket IncludedNo
MaterialA356.0-T6 Aluminum
Product TypeDifferential Cover
Thickness (in)4
California Proposition 65 Chemical NameChromium (hexavalent compounds)
California Proposition 65 RequiredYes
Part Number41299



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

In The Box

In The Box

  • Cover
  • Fill Plug
  • Drain Plug
  • Bolts
  • Washers
  • Load Bolts
  • Nuts
  • Instructions

Tech Resources

Designed to fit most 1985-2020 Ford F-250/350 Super Duty trucks, 2000-2005 Excursion and 2006-2008 Lincoln Mark LT trucks with single rear axle Sterling 10.25-10.5-inch differential, however vehicles may have other interfering components that may require modifications or moving of existing brackets, require longer cover bolts or different cover bolts, clearance of sway bars etc. - Checking for adequate clearance and fitment for your application should be verified prior to purchase & installation. Refer to ID guide and measurement drawings for specifications.


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