What is the main benefit of SPC's xAxis joints over stock joints?

SPC's xAxis joints feature highly polished electroless nickel plated balls and moly-impregnated nylon races, which offer improved corrosion and wear resistance. They are also designed to be maintenance-free and come pre-greased.

What tools are needed to install these joints?

You will typically need a press tool to install and remove these joints from the knuckle. SPC recommends their press tool #40940 or a similar tool for proper installation.

Does this kit include everything needed to replace all rear joints?

Yes, this kit includes four (4) xAxis joints, which is the correct amount to service all the cross axis ball joints on the IRS rear end of your Mustang. It also includes press tool adapters to aid in installation.

1999-2004 Ford Mustang IRS XAXIS Joint Set | SPC Performance

Name: SPC Performance Cobra IRS XAXIS Joint Set (4)
Brand: SPC Performance
SKU: spc-performance-spc-performance-cobra-irs-xaxis-joint-set-4-t14-4387903
Price: 295.95 USD
Availability: InStock

SPC Performance Cobra IRS XAXIS Joint Set (4)

$295.95

Only 2 left in stock

Fits 1999-2004 Ford Mustang. Replaces worn rear IRS cross axis ball joints with durable, maintenance-free xAxis joints for improved rear suspension performance.

Key Features

Fits 1999-2004 Ford Mustang Cobra IRS.
Replaces worn rear knuckle cross axis ball joints.
Features highly polished electroless nickel plated balls for smooth operation.
Corrosion and wear resistant moly impregnated nylon races ensure durability.
Sealed dust boots keep contaminants out for a long service life.
Joints come pre-greased with moly grease and are maintenance-free.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

Product Details

If you're working on the rear suspension of your 1999-2004 Ford Mustang Cobra, especially the Independent Rear Suspension (IRS), you might run into worn cross axis ball joints. These SPC Performance xAxis Joint Sets are designed to replace those tired units, bringing back solid feel and control to your rear end. They're built to keep contaminants out and lubrication in, so you can expect them to last.

SPC uses highly polished electroless nickel plated balls inside these joints. The races are made from a nylon material that's impregnated with Moly, which is known for being resistant to corrosion and wear. This combination, along with sealed dust boots, helps ensure a long service life. They come pre-greased with moly grease, meaning they're maintenance-free once installed. This kit includes four xAxis joints, enough to service the entire rear end, and also comes with press tool adapters to help with installation.

When you're replacing these joints, you'll typically need a press tool to get them in and out of the knuckle. SPC recommends their press tool #40940 or a similar tool. If you only need to replace a single joint, SPC offers part number 15645.