Radi-CAL Competition Brake Kits

“Radi-CAL” is a blanket term used to describe AP Racing’s patented asymmetrical brake caliper design. Radi-Cal technology is grounded in Computer Aided Design (CAD) and Finite Element Analysis (FEA), and allows for organic, alien-looking designs that are a radical departure from conventional caliper designs of the past. Calipers leveraging the Radi-CAL design philosophy are widely considered the pinnacle of current brake caliper technology. Since their inception in 2007, these revolutionary calipers have amassed a lengthy string of race victories at all levels of professional motorsport, while redefining brake performance expectations. Please click here for the AP Racing Radi-CAL story.

While our standard Essex Designed AP Racing Competition Brake Kits remain an excellent choice for chasing lap times, our Radi-CAL Competition Brake Kits bring the bleeding edge of racing brake technology to the common enthusiast. These systems include all of the standard features of our Competition BBK's, but leverage AP Racing's Pro5000R Radi-CAL's to increase stiffness, lower mass, and optimize cooling and wheel fitment.

The key benefits of the Radi-CAL design are:

  • Massive Stiffness Increase- A 30+ % increase in both static and dynamic stiffness allows for far less deflection under load, which means superior pedal feel & modulation, more even pad wear, and longer caliper service life.
  • Considerable Mass Reduction- Removing all extraneous caliper mass lowers the caliper weight, despite the huge stiffness increases.
  • Optimized Airflow- Air moves around and through the caliper more efficiently, providing superior heat evacuation.
  • Efficient Packaging- The wide, asymmetric caliper profile and internal porting allows the caliper to fit into tighter spaces.

For a comparison between the various types of big brake kits that we offer, please visit our big brake kit overview page.




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News & Blog

October 20th 2021
Video: AP Racing vs. OEM Porsche GT Car Brakes

A deep-dive into the tech behind the results.

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October 15th 2021
Dundon Develops a Monster 718 GT4 with AP Radi-CAL Brakes

All the goodies required to make the GT4 a track terror

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October 13th 2021
Rob Harper Crowned USTCC GT Champion in his AP Equipped C5!

How to blow your rear diff on the first lap of qualifying and still claim a championship!

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