HSF 20-26 Explorer ST Upgraded Rear Differential Bolt

*** HIGHLY RECOMMEND PARING WITH DIFF BRACE, IF INSTALLED WITHOUT A DIFF BRACE YOU RUN A HIGH CHANCE OF BREAKING THIS BOLT, THIS BOLT ALONE IS NOT SUFFICIENT ENOUGH TO SUPPORT YOUR DIFF ALONE***

Understanding Hardware Strength:

You might be asking, what’s the difference between these options?

The ratings indicate the tensile strength and yield strength of each bolt:

 Tensile strength: The maximum amount of stretching force a bolt can withstand before breaking.

 Yield strength: The maximum load a bolt can take before permanently deforming.

Option 1: Standard 12.9 Alloy Bolt (Baseline Upgrade)

Upgrade your factory OEM 10.9 bolt to high-grade 12.9 alloy hardware.

 Tensile Strength: ~175,000 to 180,000 PSI

 Performance: Roughly 20–25% stronger than the OEM 10.9 bolt, making it a beefier, much stronger option for daily driving and light track use.

 Installation Tools: 18mm socket to remove OEM bolt | 12mm Allen/Hex head socket to install new bolt.

What’s Included (12.9 Option):

 (1) 12.9 High-Strength Bolt

 (1) Stainless Steel Washer

Option 2: HSF x ARP 8740 Chromoly Bolt (Ultimate Bulletproof Upgrade)

Custom-engineered in direct collaboration with ARP specifically for the Explorer ST platform.

 Tensile Strength: ~200,000 PSI

 Performance: Roughly 25% stronger than our 12.9 option (~45%+ stronger than OEM 10.9) to handle severe shock loads, sticky tires, and aggressive launches.

 Installation Tools: 18mm socket to remove OEM bolt | 5/8" 12-point socket to install new ARP bolt.

 Note: Limited initial production run of 100 units. Pre-orders are currently en route from ARP and ship by the end of this month!

What’s Included (ARP Option):

 (1) HSF-Spec ARP 8740 Chromoly 12-Point Bolt

 (1) Stainless Steel Washer

Torque Specs & Fitment:

 Recommended Torque: 140–150 ft-lbs

 Fitment: 2020+ Ford Explorer ST and Aviators