Monoball kit, 2015-2021 S550 Mustang, GT350, Front and Rear

(4 customer reviews)


SKU:  SBK-50-1000


CorteX Racing monoball kit for S550 and GT350 front and rear lower control arms.

We replace the soft rubber bushings at the front lower control arm caster link as well as the rear lower control arm forward mounting point for precision control and reduced hysteresis.

Improve Performance

Both of these bushing locations showed drastic deflection during on-track driving resulting in loss of performance. These bushings are essential for any dedicated track car and the best part NVH increase is minimal so we use them on our street cars as well!


Available on backorder


Monoball kit, Front and Rear Kit

CorteX Racing new monoball control arm kit


2015-2021 S550 Mustangs, Shelby GT350 and GT350R.

This upgrade is what we have done to our World Challenge race cars and now it is available for you to install on your vehicle for performance driving, track, or competitive racing.

DIY Easy Install

This parts can be installed at home if you have access to a press for removal of the OEM rubber bushings. If you don’t have access to a press we are more than happy to install them for you if you remove your control arms and ship them to us.  Call us for details or simply add the Cortex installation option before checking out!

What does this do for you?

Spherical bearings allow the arms to pivot in a smooth, and accurate motion as intended. No more deflection under loading, no more changing in toe which results in an inconsistent and nervous feeling on track!

The CorteX Racing monorails utilize American made high quality stainless ball with a Teflon lined race so you will have years of trouble free life from the bearings, just like our camber plates and sway bar end links.

Kits include:

  • mono ball housings,
  • bearings,
  • retaining clips,
  • spacers, 
  • Loctite sleeve retainer

Instructions are available for download online. Bearings are pre-assembled in the housings before shipment to the user.

Also notice our optional OEM bushing removal mandrels available as an option.  They are perfectly sized to allow removal of the OEM bushings without damaging the control arms when using a press.

Deflection in Action

Check out this undercar video of the rear lower control arm bushing deflecting from simply driving the car around the parking lot.

Additional information

Weight 7 lbs
Dimensions 10 × 10 × 4 in

4 reviews for Monoball kit, 2015-2021 S550 Mustang, GT350, Front and Rear

  1. Ryan M (verified owner)

    Great product, the results are amazing. Took a base model GT and made it a completely different animal.

  2. Dean Martin

    Awesome product! Well engineered. Easy install.

  3. Cory D (verified owner)

    Great Design, High Quality Components, Exceptional Performance.

  4. Bim Berish (verified owner)

    Fantastic. Better handling and feedback to the driver. I was amazed how solid it made the suspension feel.

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