What is a torque box and why does it need reinforcement?

The torque box is the area on the chassis where the front of the lower control arm mounts. On 1979-1993 Ford Mustangs, this area can be a weak point, especially with V8 engines and aggressive driving, leading to cracks. These reinforcements add strength to prevent that damage.

Can I install these reinforcements myself?

Yes, these are designed for either welding or bolting in. The manufacturer estimates the installation time to be around 2 to 2.5 hours. All necessary hardware and instructions are included.

Do these reinforcements come painted?

No, the reinforcements are supplied bare metal. This allows for proper welding if you choose that installation method. You will need to paint them after installation to protect against rust and corrosion.

UMI Performance 79-93 Ford Mustang Lower Control Arm Reinforcements

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Specifications

Brand: UMI Performance
Part #: 1001
UPC: 1001

UMI Performance 79-93 Ford Mustang Lower Control Arm Reinforcements

Name: UMI Performance 79-93 Ford Mustang Lower Control Arm Reinforcements
Brand: UMI Performance
Price: 141.43 USD
Availability: InStock

$141.43

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Fits 1979-1993 Ford Mustang. UMI Performance Lower Control Arm Reinforcements reinforce weak torque boxes to prevent cracking.

Key Features

Fits 1979-1993 Ford Mustang.
Reinforces the front lower control arm mounting points (torque boxes) to prevent cracking.
Designed to address chassis weaknesses common in aggressive driving, racing, or with high-torque applications.
Recommended for use with aftermarket control arms, polyurethane bushings, or lift bars.
Can repair existing cracks and reinforce undamaged torque boxes.
Can be installed via welding or bolting.

⚠️ 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

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Fits this vehicle

Ford Mustang 1979-1993

Product Details

If you're pushing your 1979-1993 Ford Mustang hard, especially with a 5-speed transmission or sticky tires, you might be seeing cracks in the torque boxes. These areas are the front mounting points for your lower control arms, and the stock chassis on these cars can struggle with the torque from a V8. UMI Performance designed these lower control arm reinforcements to address that weak spot. They're built to fix existing cracks and prevent new ones from forming, keeping your suspension geometry solid.

These reinforcements are a smart addition if you're running any aftermarket control arms, polyurethane bushings, or UMI lift bars, as those components can put extra stress on the stock torque boxes. The kit comes with all the necessary hardware and installation instructions. You'll need to either weld or bolt these in, and the process typically takes about 2 to 2.5 hours. They come bare metal, so you'll want to paint them after installation to protect them from corrosion.