Essex

Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front 9661/355mm)- Porsche 981 and 718 Boxster & Cayman

Regular price $4,199.00 Save $-4,199.00
0 in stock

Complete front Essex Designed AP Racing Radi-CAL Competition Brake Kit fits all variants of the Porsche 981 (2013-2016) Boxster and Cayman, except for the GT4. Also fits 718 Boxster S & Cayman S.

  • Features AP Racing CP9661 Radi-CAL six piston calipers
  • Eliminates need to remove caliper for pad change
  • Huge array of brake pad options from all major pad manufacturers
  • 355x32mm, 72 vane AP Racing disc
  • Saves 2 to 10 unsprung lbs. from nose vs. OEM S brakes depending on application
  • 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

 

Advantages Over OEM Brake System

Our CP9661/355mm Radi-CAL Competition Brake Kit offers our customers the following advantages over the OEM brake system:

  • Eliminates the need to remove caliper for front pad change
  • Removes 2lbs. of unsprung weight compared to the OEM 981 Cayman S system, and 10 lbs. from the 718 OEM S system.
  • AP Racing Radi-CAL calipers are the stiffest, lightest, and most technologically advanced calipers available at any price
  • CP9661 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, 72 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 ($359 each).
  • 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


2013-2016

2013-2015

2016+



Boxster/Cayman 981

Boxster/Cayman 981

Boxster/Cayman 718


Essex/AP BBK

Base

S & GTS

S

Caliper

CP9661-2S4L/3S4L




Weight no Pads

6.2 lbs.


6.5 lbs.

9.0 lbs.


27.0mm x 2




Piston Sizes

28.6mm x 2





31.8mm x 2




Piston Area

40.1cm^2




Inlet Thread

M10x1.0




Mounting Type

Radial




Mtg. Centers

180mm




Mtg. Offset

42mm




Pad thickness

18mm




Disc

CP5773-102/103GA




Type

2-piece floating

One-piece

One-piece drilled

One-piece drilled

Weight

17.6 lbs.

lbs.

20.2 lbs.

21.7 lbs.

Diameter

355mm

mm

330mm

330mm

Thickness

32mm

mm

28mm

34mm

Radial Depth

54mm




No. of Vanes

72


30 split, 30 solid 30 split, 30 solid
Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front 9661/355mm)- Porsche 981 and 718 Boxster & Cayman
Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front 9661/355mm)- Porsche 981 and 718 Boxster & Cayman
Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front 9661/355mm)- Porsche 981 and 718 Boxster & Cayman
Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front 9661/355mm)- Porsche 981 and 718 Boxster & Cayman
Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front 9661/355mm)- Porsche 981 and 718 Boxster & Cayman
Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front 9661/355mm)- Porsche 981 and 718 Boxster & Cayman