AP Racing 6 Port C9660 Front Brake kit with J Hook suit Subaru WRX/STI/BRZ

AP Racing Radi-CAL Competition Brake Kit (Front 9660/355mm)- Subaru STi WRX 

"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.

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.
Efficient Packaging- The asymmetric caliper profile and internal fluid porting allows the caliper to fit into tighter spaces.
Benefits
Eliminates 23 lbs. of unsprung weight from the nose of the car
Clears OEM 19" wheels without a spacer and many 18" wheels
AP Racing Radi-CAL calipers are the stiffest, lightest, and most technologically advanced calipers available at any price
CP9660 calipers use a 18mm thick, 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 two bolts or quick-change spring clip, no caliper removal required
Lifetime professional caliper rebuilding support by Essex (at a fee)- pull off your calipers, send them to us, we clean, inspect, and rebuild them
Available disc burnishing service ensures that your kit arrives ready to be installed and driven hard immediately
Championship winning, 84 vane, fully floating, AP Racing J Hook racing discs with 12 attachment points to hat
Anti-knockback/anti-rattle disc attachment hardware
Replacement iron disc rings available at an extremely competitive replacement price
Disc metallurgy specifically designed to handle the temps typically seen on track offer a long service life
Highest quality, Spiegler stainless steel brake line with clear sheath that reduces compliance over OEM rubber design
One of the great benefits of the AP Racing calipers in our system is that they are designed to accommodate pads from a wide range of manufacturers. Each manufacturer builds their pads with specifications that are slightly different. As such, pads from different manufacturers, or even from different batches, won't always fit in the calipers in exactly the same manner. Some pads are a snug fit, while others may rattle around and produce noise.

SPECIFICATIONS

One pair AP Racing CP9660 Radi-CAL Pro5000R six piston calipers
One pair 355x34mm AP Racing CP6084, 84 vane, J Hook racing discs, with fully floating 6061 hard anodized aluminum hats, and attachment hardware
One pair caliper mounting brackets and hardware
One pair Spiegler Stainless Steel Brake Lines with abrasion resistant coating
Detailed installation instructions
Brake pads are NOT included with our system. Racing brake pads are a highly personal choice. Many manufacturers include a set of inexpensive, low quality pads with their brake kits. Rather than artificially inflating the price of our system with a set of pads you probably don't want anyway, we've decided to remove the cost from our system and allow our customers to choose the pads that best suit their needs/wants.
Pad Tension Clips (frequently referred to as anti-rattle clips) are NOT included with our Competition Kits, but we do offer them as an option if you're concerned about NVH. 

FITMENT