Ford 15-23 Mustang S550 Mach 1 Front Knuckle & Hub Upgrade Kit

Upgrade your S550 with the very best factory suspension geometry Ford offered for that generation Mustang. This kit swaps in the Mach 1 front knuckles and stronger, wider hub bearings, delivering sharper steering response, reduced bumpsteer, and improved front tire grip.

Every component is genuine OE Ford, track-tested and proven. The wider hub design increases strength and longevity, preventing premature bearing failure while tightening up steering feel. With everything needed for installation included, this is a true bolt-on upgrade that brings Mach 1 handling precision to your GT or EcoBoost. All kit components are factory equipment from the Mustang Mach 1.

Some products in this kit may not be in stock as Ford's inventory can fluctuate. If you are on a time crunch, please reach out to us and we'll check on inventory for you!

Key Benefits:

• Improved steering & suspension geometry

• Reduced bumpsteer and increased grip

• Stronger, wider hub bearings for durability

• 100% OE Ford components

• Direct bolt-on fit for 2015–2023 Mustangs (excl. GT350/GT500)

Mach 1 Front Knuckle & Hub Kit Contents:

• Knuckle Bolt - W721525-S439 (x8)
• ABS Sensor Bolt - W719246-S442 (x2)
• ABS Sensor - JR3Z-2C204-A
• ABS Sensor - JR3Z-2C205-A
• Wheel Bearing And Hub Assembly - PR3Z-1109-D (x2)
• Knuckle - NR3Z-3K185-A
• Knuckle - NR3Z-3K186-A
• Brake Dust Shield - FR3Z-2K004-H
• Brake Dust Shield - FR3Z-2K005-H

Fitment / Application Notes:

• NOT applicable to GT350 or GT500
• Direct, bolt-on installation.

  Alternate Part Numbers: W714333S439, JR3Z2C204A, JR3Z2C205A, NR3Z3K185A, NR3Z3K186A

  Replaces Part Number: PR3Z-1109-B, PR3Z1109B