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1964-1970 Mustang/Shelby
Frame Stiffening Components
 
The Proven Innovator - not an imitator!

Quick Facts

  • Frame stiffening is the first step you should take to improve performance
  • Allows suspension to function properly
  • Decreases frame twist under acceleration.

1964-1970 Mustangs have a notoriously weak chassis.  Take a close look at a Mustang that has been run hard.  The doors may not close right, convertible tops do not line up and the alignment shop has trouble getting the car to drive straight.  Road race and auto cross cars can actually get shorter from hard braking.  If you want your car to remain rattle-free and strong and you want to get the most out of other chassis and engine modifications, you have to connect the frame sections with something beefier than sheet metal.  Sub-frame connectors are a requirement.  They are also inexpensive. 

All of our frame kits are strong, designed to keep weight to a minimum while adding the greatest torsional rigidity and structural integrity possible for safety.  We have been thanked by several drivers that have experienced serious crashes in both street and track GR40 Mustangs equipped with our frame kits. All of them commented on how the driver's compartment did not crush around their feet thanks to the frame kit they installed.

For more information please review the following:
"Been There, Done It All" - October 2004, 5.0 Mustang and Super Fords
(12.4 MB pdf)
"The GR40 Suspension System" - Griggs Racing
"Some Helpful Definitions" - Griggs Racing

    Price   Product Name   Model   Buy Now 
 Complete World Challenge Frame Kit ('79-'04)   $497.50   Complete World Challenge Frame Kit ('79-'04)   MFK 2000 WC  Buy Now 
 Lower Subframe Connectors ('64-'66)   $264.95   Lower Subframe Connectors ('64-'66)   EMFK 1000 C 66  Buy Now 
 Lower Subframe Connectors ('67-'70)   $264.95   Lower Subframe Connectors ('67-'70)   EMFK 1000 C 67  Buy Now 
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Please note: Prices are subject to change.
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