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AP Racing Essex Rear CP9451-2/3S4L 4 pot 340x28/48V Radi-CAL ENP Competition Brake Kit Ford
$5249.00
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Complete rear ENP Finish (Electroless Nickel Plated) AP Racing by Essex Radi-CAL Competition Brake Kit for custom 9" Ford rear end applications:

Advantages Over OEM Brake System:
  • AP Racing Radi-CAL calipers are the stiffest, lightest, and most technologically advanced calipers available at any price
  • Electroless Nickel Plated (ENP) caliper finish that is resistant to wear and deterioration, even at elevated temperatures
  • Calipers use a 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
  • 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 one bolt, 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 48 vane fully floating AP Racing J Hook discs
  • 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
Features:
  • This kit is intended for custom builds and may require additional modifications to your vehicle
  • Designed specifically to fit Detroit Speed's 9" Ford Full Floater rear axle setups with a Torino-style flange (2.5" offset)
  • Bolt pattern on disc hat dual-drilled for GM (5 x 4 3/4") and Ford (5 x 4 1/2") wheels
  • Performance rear brake upgrade for track-driven pro-touring and restomod builds
  • Every component designed to withstand the heat of extensive racetrack use
  • 340x28mm 48 vane heavy duty AP Racing J Hook discs
  • AP Racing CP9451 Radi-CAL four piston calipers
  • Jewel-like ENP caliper finish is incredibly durable and easy to clean
  • Piston diameters: 25.4mm x 2, 28.6mm x 2
  • Multiple piston size options are available
Specifications:
  • Caliper: CP9451-2/3S4L, 4 pot, ENP
  • Disc Size/Vanes: 340x28/48V
  • Brake Disc
  • Brake Pads
What's in the Box?
  • One pair AP Racing CP9451 Radi-CAL Pro5000R racing calipers in ENP Finish (Electroless Nickel Plated)
  • One pair 340x28mm AP Racing heavy duty J Hook racing discs, with fully floating 6061 hard anodized aluminum hats and attachment hardware
  • One pair billet aluminum axle plates with parking brake assemblies and caliper mounting brackets
  • Due to variances in axles/hubs, extra shims are also included to center the caliper on the disc
  • Brake lines are NOT included, because of the wide range of possible vehicle applications.
  • 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.
  • Pad Tension Clips (frequently referred to as anti-rattle clips) are NOT included with our Competition Kits, but we do offer them as an option if you're concerned about NVH. One of the great benefits of the AP Racing calipers in our system is that they are designed to accommodate pads from a wide range of manufacturers. Each manufacturer builds their pads with specifications that are slightly different. As such, pads from different manufacturers, or even from different batches, won't always fit in the calipers in exactly the same manner. Some pads are a snug fit, while others may rattle around and produce noise. The Essex Designed Pad Tension Kit is designed to dramatically reduce pad movement inside the caliper, along with just about all resulting noise.
Fitment:
  • 9" Ford Live Rear Axle Kit w/9451 Caliper (Custom)
Notes:
  • Brake pads are NOT included with our system
  • Brake lines are NOT included, because of the wide range of possible vehicle applications. However, Essex can offer Spiegler stainless lines with custom length, color, and fitting options for an additional cost (more info here).
  • Each caliper requires one Pad Tension Kit. If you need enough tension blocks for both of your calipers, you need to order two of these kits!
  • Call for application assistance


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Vehicle Make/Model
Ford Bronco 1966-1974, 2021-2023 Base
Ford Bronco 1968-1969 Roadster
Ford Bronco 1968-1973 Wagon
Ford Bronco 1975-1993 Custom
Ford Bronco 1975, 1978 Northland
Ford Bronco 1975-1977 Sport
Ford Bronco 1975 Ranger
Ford Bronco 1978-1981 Ranger XLT
Ford Bronco 1982-1983, 1993 XLT Lariat
Ford Bronco 1982-1983 XLS
Ford Bronco 1984-1992, 1994-1996 XLT
Ford Bronco 1985-1996 Eddie Bauer
Ford Bronco 1990-1996 XL
Ford Bronco 1992 XLT Nite
Ford Bronco 1995-1996 XLT Sport
Ford Bronco 2021-2023 Big Bend
Ford Bronco 2021 First Edition
Ford Bronco 2021-2023 Wildtrak
Ford Bronco 2021-2023 Outer Banks
Ford Bronco 2021-2023 Black Diamond
Ford Bronco 2021-2023 Badlands
Ford Bronco 2022-2023 Everglades
Ford Bronco 2023 Heritage Edition
Ford Bronco 2023 Heritage Limited Edition
Ford Bronco II 1984-1985 XLS
Ford Bronco II 1984-1990 Eddie Bauer
Ford Bronco II 1984-1990 XLT
Ford Bronco II 1984-1986 Base
Ford Bronco II 1987-1990 XL
Ford Bronco II 1988-1990 XL Sport
Ford Bronco II 1989-1990 XLT Plus
Ford Bronco Sport 2021-2025 Badlands
Ford Bronco Sport 2021-2025 Outer Banks
Ford Bronco Sport 2021-2025 Big Bend
Ford Bronco Sport 2021 First Edition
Ford Bronco Sport 2021-2023 Base
Ford Bronco Sport 2023-2025 Heritage Edition
Ford Bronco Sport 2023 Heritage Limited Edition
Ford Bronco Sport 2024-2025 Free Wheeling
Ford Bronco Sport 2024 Black Appearance
Ford Bronco Sport 2025 Badlands Sasquatch
Ford Contour 1995-2000 SE
Ford Contour 1995-1998 GL
Ford Contour 1995-2000 LX
Ford Contour 1995 LX Sport
Ford Contour 1995 GL Sport
Ford Contour 1996-2000 Power
Ford Contour 1996-1998 Sport
Ford Contour 1996-2000 Base
Ford Contour 1998-2000 SVT
Ford Crown Victoria 1992-2008, 2010-2011 Base
Ford Crown Victoria 1992-2011 LX
Ford Crown Victoria 1992 Touring Sedan
Ford Crown Victoria 1992-2005 S
Ford Crown Victoria 1993-2011 Police Interceptor
Ford Crown Victoria 2002-2009 LWB
Ford Crown Victoria 2004-2006 LX Sport
Ford Crown Victoria 2005 Special Edition
Ford Crown Victoria 2006-2009 Fleet
Ford E-150 2002-2014 XL
Ford E-150 2003-2014 Base
Ford E-150 2006-2007 Chateau
Ford E-150 2006-2014 XLT
Ford E-150 Club Wagon 2003-2005 XL
Ford E-150 Club Wagon 2003-2005 XLT
Ford E-150 Club Wagon 2003-2005 Chateau
Ford E-150 Econoline 1992-2000 XL
Ford E-150 Econoline 1992-2002, 2007-2008 Base
Ford E-150 Econoline Club Wagon 1992-2002 XLT
Ford E-150 Econoline Club Wagon 1992-2002 Chateau
Ford E-150 Econoline Club Wagon 1992-2000 Custom
Ford E-150 Econoline Club Wagon 2001-2002 XL
Ford E-250 2003-2014 Base
Ford E-350 Club Wagon 2003-2005 Chateau
Ford E-350 Club Wagon 2003-2005 XL
Ford E-350 Club Wagon 2003-2005 XLT
Ford E-350 Econoline 2007-2008 Base
Ford E-350 Super Duty 2003-2019, 2021-2023 Base
Ford E-350 Super Duty 2006-2014 XLT
Ford E-350 Super Duty 2006 Chateau
Ford E-350 Super Duty 2006-2014 XL
Ford E-Transit 2022-2023 Base
Ford E-Transit 2022-2023 Larga
Ford E-Transit 2022-2023 Regular
Ford E-Transit 2022-2023 Extendida
Ford EcoSport 2011 Base
Ford EcoSport 2018-2022 S
Ford EcoSport 2018-2019 Impulse
Ford EcoSport 2018-2022 Titanium
Ford EcoSport 2018-2021 Trend
Ford EcoSport 2018-2022 SES
Ford EcoSport 2018-2022 SE
Ford EcoSport 2021 Storm
Ford Edge 2007-2023 SEL
Ford Edge 2007, 2017-2023 SEL Plus
Ford Edge 2007-2023 SE
Ford Edge 2008-2014 Limited
Ford Edge 2009-2018 Sport
Ford Edge 2015-2023 Titanium
Ford Edge 2019-2023 ST
Ford Edge 2020-2023 ST-Line
Ford Escape 2001-2012 XLT
Ford Escape 2001-2012 XLS
Ford Escape 2003-2012 Limited
Ford Escape 2005 XLT No Boundaries
Ford Escape 2005 XLT Sport
Ford Escape 2005-2007 XLT Deportivo
Ford Escape 2005-2012 Hybrid
Ford Escape 2009-2012 Limited Hybrid
Ford Escape 2011-2012 Limited Plus
Ford Escape 2013, 2018-2022 SEL
Ford Escape 2013-2022 Titanium
Ford Escape 2013-2014 SE Plus
Ford Escape 2013-2022 S
Ford Escape 2013-2022 SE
Ford Escape 2013-2014, 2017-2019 S Plus
Ford Escape 2015-2016 Trend
Ford Escape 2017-2019 Trend Advance
Ford Escape 2020 SE Sport Hybrid
Ford Escape 2020-2022 Titanium Hybrid
Ford Escape 2020-2022 SEL Plug-In Hybrid
Ford Escape 2020-2022 Titanium Plug-In Hybrid
Ford Escape 2020-2022 SE Plug-In Hybrid
Ford Escape 2021-2022 SE Hybrid
Ford Escape 2021 SE Limited Hybrid
Ford Escape 2021-2022 SEL Hybrid
Ford Escape 2022 SEL Limited
Ford Escape 2023 ST-Line
Ford Escape 2023 ST-Line Elite Hybrid
Ford Escape 2023 ST-Line Hybrid
Ford Escape 2023 ST-Line Elite
Ford Escape 2023 Active
Ford Escape 2023 Base
Ford Escape 2023 Platinum
Ford Escape 2023 Platinum Hybrid
Ford Escape 2023 ST-Line Select Hybrid
Ford Escape 2023 ST-Line Select
Ford Escape 2023 Plug-In Hybrid
Ford Escort 1992-1995 LX Sport
Ford Escort 1992-1996 GT
Ford Escort 1992-1997 Base
Ford Escort 1992-2000 LX
Ford Escort 1992-1993 LX-E
Ford Escort 1993, 1996-1997 Sport
Ford Escort 1994 Lujo
Ford Escort 1995-1997 Mid
Ford Escort 1995-1997 Aust
Ford Escort 1995-1997 Equi
Ford Escort 1995 GT Equippe
Ford Escort 1997 Deportivo Equi
Ford Escort 1997 Deportivo
Ford Escort 1998-1999 ZX2 Equi
Ford Escort 1998-1999 ZX2 Hot Coupe
Ford Escort 1998-1999, 2001-2002 SE
Ford Escort 1998-1999 ZX2 Cool Coupe
Ford Escort 1998-1999 SE Equi
Ford Escort 1998-1999 ZX2 Tipico
Ford Escort 1999-2000 ZX2 S/R
Ford Escort 2000-2002 ZX2
Ford Excursion 2000-2005 Limited
Ford Excursion 2000-2005 XLT
Ford Excursion 2003-2005 Eddie Bauer
Ford Excursion 2004-2005 XLS
Ford Expedition 1997 XLT Plus
Ford Expedition 1997-2010 Eddie Bauer
Ford Expedition 1997-2023 XLT
Ford Expedition 2004 NBX
Ford Expedition 2004-2006 XLS
Ford Expedition 2004, 2006 XLT Sport
Ford Expedition 2005-2023 Limited
Ford Expedition 2005-2006, 2008-2017, 2020-2023 King Ranch
Ford Expedition 2007-2017 EL XLT
Ford Expedition 2007-2017 EL Limited
Ford Expedition 2007-2010 Max Eddie Bauer
Ford Expedition 2007-2008 Eddie Bauer Max
Ford Expedition 2007-2023 Max Limited
Ford Expedition 2007-2010 EL Eddie Bauer
Ford Expedition 2008 Funkmaster Flex Edition
Ford Expedition 2008-2017 EL King Ranch
Ford Expedition 2009-2011, 2020-2023 Max King Ranch
Ford Expedition 2011, 2014-2019, 2022 Max XL
Ford Expedition 2011-2017 EL XL
Ford Expedition 2011-2019, 2022 XL
Ford Expedition 2015-2017 EL Platinum
Ford Expedition 2015-2023 Platinum
Ford Expedition 2016-2017 EL SSV
Ford Expedition 2016-2023 SSV
Ford Expedition 2016-2023 Max Platinum
Ford Expedition 2018-2023 Max SSV
Ford Expedition 2018-2023 Max XLT
Ford Expedition 2022-2023 Timberline
Ford Expedition 2023 XL STX
Ford Explorer 1991-1993, 2011-2023 Base
Ford Explorer 1991-2010 Eddie Bauer
Ford Explorer 1991-2023 XLT
Ford Explorer 1991-1993 4x4
Ford Explorer 1991-1999 XL
Ford Explorer 1991-2000, 2013-2019 Sport
Ford Explorer 1993-2023 Limited
Ford Explorer 1995 Expedition
Ford Explorer 1999-2006 XLS
Ford Explorer 2000-2003 Postal
Ford Explorer 2000-2001 XL Fleet
Ford Explorer 2004-2005 XLS Sport
Ford Explorer 2004-2005 XLT Sport
Ford Explorer 2004 NBX
Ford Explorer 2010-2013 XLT Base
Ford Explorer 2016-2023 Platinum
Ford Explorer 2020-2023 Limited Hybrid
Ford Explorer 2020-2023 ST
Ford Explorer 2021-2023 Platinum Hybrid
Ford Explorer 2021-2023 Timberline
Ford Explorer 2021-2023 King Ranch
Ford Explorer 2022-2023 ST-Line
Ford Explorer Sport 2001-2003 Base
Ford Explorer Sport 2003 XLS
Ford Explorer Sport 2003 XLT
Ford Explorer Sport Trac 2001, 2007-2010 Base
Ford Explorer Sport Trac 2002 XL
Ford Explorer Sport Trac 2003-2005 XLS
Ford Explorer Sport Trac 2003-2005, 2007-2010 XLT
Ford Explorer Sport Trac 2005 Adrenalin
Ford Explorer Sport Trac 2007-2010 Limited

AP Racing Banner

Who is AP Racing?

AP Racing has been part of the automotive industry for more than 50 years. It started back in 1920 by Edward Boughton, Willie Emmott, and Denis  Brock. They planned to import parts from the US to help maintain ex-military vehicles that were adapted for civilian use after Worl War 1. They later expanded their business by supplying parts for the British Motor Company.

Throughout the years, AP Racing has provided quality parts and specialized in clutches and brakes systems. Today, AP Racing has become one of the most recognized brands and has been well received by a lot of tuners, racers, and enthusiasts all around the globe.

AP Racing has participated in Motorsport racing and has helped produced race winners. As early as the 1930s they have already supplied parts for race cars in the British GP and have continued its tradition. In fact, it is being used by some of the best racing legends such as Jim Clark in his Lotus.

Continuous Innovation

AP Racing has always pushed itself in improving its products to create the best performing product in the market. It has helped jumpstart the development of brakes and clutch technology. The industry has come a long way from the time when brakes were made out of iron to the carbon ceramic composites of today alongside clutches capable of handling over 1000 horsepower.

Purchase AP Racing Products at Vivid Racing

When it comes to performance brakes and clutches, there are only a few brands that professionals trust and AP Racing is among the top of the list. With products that range from street applications to race-oriented brake and clutch systems, AP has it all. Visit Vivid Racing and check out the list of AP Racing products that would fit your specific needs.

By purchasing this product and opening this box, purchasers expressly acknowledge, understand and agree that they take, select and purchase these brake systems, parts, and equipment from AP Racing R, its affiliates, distributors, and agents (collectively, “AP Racing”) “as is” and “with all faults.” The entire risk as to the quality and performance of these brake systems, parts or equipment is with the purchasers. Should the goods prove defective following their purchase, the purchasers assume the entire cost for all necessary servicing or repair or any resulting liability. AP Racing R makes no warranties whatsoever, expressed or implied, oral or written, to purchasers or any users of these products. AP Racing R expressly disclaims any implied warranty of merchantability or warranty of fitness for a particular purpose, including fitness of these systems, parts or equipment for racing.

By purchasing this product and opening this box, purchasers expressly acknowledge that AP Racing R does not make or cause to make any representation or promise to purchasers which relate to the brake systems parts or equipment that becomes part of the basis of the bargain between AP Racing R and purchasers. Purchasers expressly affirm that they are relying upon their own skill and judgment in selecting and purchasing these goods as suitable for purchasers' intended use.

Purchasers understand and agree that no officer, director, salesman, distributor, or agent of AP Racing R has any authority to make any statement contrary to the terms of this disclaimer and agreement. On the contrary, AP Racing R disavows any statement contrary to what is written above.

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