AP Racing by Essex Radi-CAL Rear Competition Brake Kit | 2015-2021 Subaru WRX/STI (13.01.10127) AP Racing

High Performance Radi-CAL Rear Big Brake Kit for 2015 – 2021 Subaru WRX/STI by AP Racing

Our CP94X/340mm Radi-CAL Competition Brake Kit offers our customers the following advantages over the OEM brake system, AP Racing Radi-CAL calipers are the stiffest, lightest, and most technologically advanced calipers available at any price, Calipers use a commonly available brake pad shape, Ventilated, domed back, stainless steel pistons keep heat out of the brake fluid and provide an ultra-firm pedal, Mitigation of pad knockback via anti-knockback springs behind the caliper pistons, Anodized caliper finish that is resistant to wear and deterioration at elevated temperatures.

Stainless steel caliper hardware for a long caliper service life under frequent pad change conditions, High temperature, low drag seals that will hold up to track temps= less rebuilding and longer service life, No dust boots to burn up, Simple pad change with one bolt, no caliper removal required.

“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. Radi-CAL’s 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. For more details on the design concept and what these calipers have achieved in professional racing.

Features

• Massive Stiffness Increase- A 30+ % increase in both static and dynamic stiffness vs. conventional calipers 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 and cooling.

Applications

• 2015 – 2021 Subaru WRX
• 2015 – 2021 Subaru STI

What’s In The Box?

• 2 – CP9451 Brake Caliper
• 2 – 340mm J-Hook Brake Rotors
• 2 – Caliper Mounting Brackets
• 2 – Stainless Steel Brake Lines
• Installation Instructions

References

• Installation Instructions
• Wheel Fitment Template
• Bed In Process
• About The Product

Warranty

• AP Racing Limited Warranty