
Essex Designed AP Racing Radi-CAL Competition Brake Kit (Front 9661/355mm)- Porsche 981 and 718 Boxster & Cayman
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 |
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Essex/AP BBK |
Base |
S & GTS |
S |
|
Caliper |
CP9661-2S4L/3S4L |
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Weight no Pads |
6.2 lbs. |
6.5 lbs. |
9.0 lbs. |
|
27.0mm x 2 |
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Piston Sizes |
28.6mm x 2 |
|||
31.8mm x 2 |
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Piston Area |
40.1cm^2 |
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Inlet Thread |
M10x1.0 |
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Mounting Type |
Radial |
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Mtg. Centers |
180mm |
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Mtg. Offset |
42mm |
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Pad thickness |
18mm |
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Disc |
CP5773-102/103GA |
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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 |
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No. of Vanes |
72 |
30 split, 30 solid | 30 split, 30 solid |