AP Racing Radi-CAL Competition Brake Kit (Front 9660/372mm) For Toyota GR Supra

Features AP Racing CP9660 Radi-CAL calipers
372x34mm, 84 vane AP Racing disc
Saves 23 unsprung lbs. from nose vs. OEM brakes!
Clears the OEM Supra wheels without a wheel spacer
Will fit behind many aftermarket 18in track wheels
Every component designed to resist the heat of extended track sessions
Pistons sized properly to maintain proper brake bias and work with the OEM master cylinder and ABS system
Front kits designed to work with either OEM rear brakes or our rear AP Racing BBK
Advantages Over OEM Brake System
Our CP9660/372mm Radi-CAL Competition Brake Kit offers our customers the following advantages over the OEM brake system:

Eliminates 23 lbs. of unsprung weight from the nose of the car
Clears OEM 19in wheels without a spacer and many 18in 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
Model Year


2020+


Essex/AP BBK

Toyota GR Supra

Caliper CP9660-2S4L/3S4L

Four piston fixed Weight no Pads 6.2 lbs. & 9.2 lbs.

27.0mm x 2

Piston Sizes 31.8mm x 2 & 38.1mm x 2

Piston Area 50.1cm^2

Inlet Thread M10x1.0

Mounting Type Radial Axial

Mtg. Centers 180mm

Mtg. Offset 42mm

Pad thickness 18mm

Disc CP6084-102/103GA

Type 2-piece floating

Two piece, non-floating

Weight 21 lbs. & 28.8 lbs.

Diameter 372mm & 348mm

Thickness 34mm & 36mm

Radial Depth 54mm


No. of Vanes 84 & 48