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2006 Chevrolet Corvette Z51 Package ( Click To Change )
AP Racing Competition Front Radi-CAL Brake Kit (CP9660/372mm) - C6 Corvette
Fitment: Front

Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front CP9660/372mm) - C6 Corvette (all trims)

  • Features AP Racing CP9660 Radi-CAL six piston calipers - Learn More Here
  • 372x34mm, 84 vane AP Racing disc - Learn More Here
  • Saves 16 unsprung lbs. from nose of C6 vs. base OEM brakes, and 19 lbs. from C6 Z06
  • Every component designed to resist the heat of extended track sessions
  • Pistons sized properly to allow for seamless integration with OEM master cylinder and ABS system
  • Designed to work with OEM rear brakes or our Essex/AP Racing rear BBK

Whats in the box?

  • One pair AP Racing CP9660 Radi-CAL Pro5000R racing calipers
  • One pair 372x34mm 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. When purchasing our kit, you are able to choose one set of front pads at a substantial discount vs. the retail price.

Advantages Over OEM C6 Brake System

  • Approximately 5 lbs. of unsprung weight reduction from EACH front corner vs. base C6, or 10 lbs. of unsprung weight reduction from the car. Offers 13 lbs. unsprung weight reduction from front of C6 Z06.
  • 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

Wheel Fitment & Installation

Complete Kit Installation Instructions
Caliper Installation Drawing
Disc Installation Drawing
Wheel Fitment Template

Confirmed wheels that fit without a spacer:

  • OEM C6 Z06 Front wheels

Wheel fitment template inside a C6 Z06 OEM front Speedline wheel:

  • OEM C5 Z06 Rear 18x10.5 wheels run on the front- SOMETIMES! Please see notes below.

Our standard recommendation is to allow for at least 2mm of clearance in all areas, so this one is about as tight as you can get.

2.5 mm between the wheel spokes and the face of the caliper. This can be seen in drawing 1 below. If more clearance is desired a wheel spacer would do the job, and it could be very thin.

2 mm between the bolt-in caliper bridge and the barrel section of the wheel. In drawing 1 you can also see that a slight modification to top portion of the caliper bridge that sticks up could be add a little more clearance. That section is really just to make it easy to grab with one’s fingers. The benefits of a wheel spacer with respect to adding clearance here would be very little.

2 mm between the small piston end of the caliper body and the barrel section of the rim. See drawing 2. This is the area of most concern. We do not recommend clearancing (grinding down) that corner of the caliper.

We cannot guarantee these figures/clearances on your car, since there are variations ineverycaliper body and every wheel. What we have here looks very, very close. Actual clearances on your car will likely be a little different. Our advice is to do what you feel comfortable with based on what you’re seeing with the template on your specific setup. The dimensions of our fitment template in the link above are accurate down to the mm.

Drawing 1

Drawing 2