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
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2013-2016
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2013-2015
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2016+
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Boxster/Cayman 981
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Boxster/Cayman 981
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Boxster/Cayman 718
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Essex/AP BBK
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Base
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S & GTS
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S
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Caliper
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CP9661-2S4L/3S4L
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|
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Weight no Pads
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6.2 lbs.
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6.5 lbs.
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9.0 lbs.
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27.0mm x 2
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|
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Piston Sizes
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28.6mm x 2
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31.8mm x 2
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Piston Area
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40.1cm^2
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|
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Inlet Thread
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M10x1.0
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|
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Mounting Type
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Radial
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|
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Mtg. Centers
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180mm
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|
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Mtg. Offset
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42mm
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Pad thickness
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18mm
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Disc
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CP5773-102/103GA
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Type
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2-piece floating
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One-piece
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One-piece drilled
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One-piece drilled
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Weight
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17.6 lbs.
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lbs.
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20.2 lbs.
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21.7 lbs.
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Diameter
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355mm
|
mm
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330mm
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330mm
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Thickness
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32mm
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mm
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28mm
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34mm
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Radial Depth
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54mm
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|
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No. of Vanes
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72
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30 split, 30 solid |
30 split, 30 solid |