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Stiffening Rail ('79-'93)

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Stiffening Rail ('79-'93)


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More than just a place to put your jack...

Installed behind the rocker panel pinch weld lip, these rails multi-task by adding strength and stiffness to your Mustangs chassis as well as providing a safe and solid foundation for your jack. Pre-masked areas for welding means no powder coat to grind away, for a quick and easy installation!

A must for all track and lowered cars!

  • Manufactured of 1 x 1.5 x .083 rectangular tubing for great strength-to-weight ratio.
  • Increases chassis stiffness and strength for improved handling.
  • Provides a safe, solid and convenient location for your jack.
  • Pre-masked areas for welding require NO removal of powder coat before installation.
  • Supplied with plastic end plugs to help keep moisture out.
  • Industrial grade powder coat for long life, to outlast the vehicle.
  • Added level of safety in event of side impact.
  • Can be used alone or with Stifflers Fully Integrated Technology (FIT)System.


  • NOT required on 87~93 convertibles which came with factory installed stiffening supports ("Z" rails) along the rocker box. 

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