AP Racing AP Racing

About AP Racing

AP Racing is the leading manufacturer of performance brake and clutch systems for road and race cars. The core product range includes clutches, calipers, discs, pads, master cylinders, pedal boxes and air jacks, as well as road and competition brake systems for motorcycles.

AP Racing: The Company

AP Racing, the Coventry, UK-based Company, has achieved more international sporting success than any of its rivals, establishing itself as a key supplier at all levels of international motorsport formulae, including single seat racing, rallying, sports car racing, stock car racing and touring cars. In 2012 alone, AP Racing supplied either brakes, clutches or both to over 30 champions across the entire spectrum of the motorsport world. For over 50 years AP Racing has been at the forefront of the motorsport industry, creating winners on track.


In 2007 AP Racing introduced the Radi-CAL™ brake caliper range, a revolution in brake caliper technology which features a new design concept that improves efficiency, cooling and driver control. This proven race winning technology is available for F1, F3, NASCAR, GT1, LMP1, LMP2 and WTCC classes, with the revolution continuing in 2012 / 2013 with a second generation evolving and making its debut sometime later this year. AP Racing will continue to add to the 69 current variants of the concept and will include some new additions to the OEM and Aftermarket calipers ranges for 2014.

Formula One

AP Racing's success has been underlined by the fact that every Formula One Championship since 1967 has been won using the company's equipment. Since their first appearance in F1 at the Dutch Grand Prix in 1967, AP Racing has achieved over 725 wins with brakes, clutches or both.

Road Cars

All of the organization's products are developed in close co-operation with leading car manufacturers using state-of-the-art, three-dimensional solid modelling/design and Finite Element Analysis CAD facilities, and dynamometers that simulate real world conditions. AP Racing also supplies leading performance car manufacturers with brake and clutch components as well as producing a comprehensive range of bolt on replacement performance brake kits.


Steve Millen Sportparts, Inc. and STILLEN humbly started their race to the front of the pack in 1986. Starting with aftermarket mini-truck appearance packages, we quickly found ourselves fulfilling customer's requests to build products for other vehicles such as vans and full-sized trucks.

With that came performance parts, suspension pieces, and upgraded brake products such as big brake systems. Capitalizing on his racing career, and knowing what it took to make sports cars perform like no other, it was only natural for Steve Millen to branch out into the import car scene. Over two decades later, we offer a full array of products encompassing styling, performance, handling, and braking products for just about any car, truck, or SUV.

Our product specialists have been in the game longer than most and are active members of the automotive community. They are more than just "enthusiasts", they are automotive gurus. Their level of expertise and knowledge is the cornerstone of providing our customers with the right parts every time.

Racing History

STILLEN Company founder Steve Millen has been globally racing at the professional level for over 30 years. Formula Fords in Singapore, Rally Cars in Africa, Trucks in football stadiums and Nissan Prototypes at Le Mans and the 24 Hours of Daytona are just some of Steve's victory credits. Steve captured the prestigious title of IMSA GT Driver's Championship in both 1992 and 1994 driving his Cunningham Racing prepared Nissan 300ZX Twin Turbo racecar. His lengthy list of wins has earned him a new title that may remain intact for decades to come.

About Stillen

This legacy of racing experience has led the way in every aspect of the STILLEN business. A fundamental part of success in racing rests in the ability to continually refine performance by a program of modification and testing. Throughout the years, this has been Steve Millen's forte. He is sought out for testing by such magazines as Road & Track where you will often see his name or byline when they are testing the most powerful and exotic sports cars in the world. For STILLEN, this means that we build and sell parts that work. We also constantly refine existing parts. It's this type of professional product evaluation in real-world driving situations that give STILLEN a distinct advantage. Automotive journalists at magazines such as Car & Driver, Road & Track, Motor Trend, Automobile, AutoWeek, Turbo, and Sport Compact Car have reviewed and tested many of our products and project vehicles, and provided us with rave reviews.

Customer Service & Facility

We pride ourselves in offering the absolute best customer service in the industry. Our sales associates are even here on the weekends making sure our customers are absolutely satisfied with their level of service.

About Stillen

We currently employ over 100 people, and for many of our vendors, we are their largest customer. The corporate complex is comprised of three buildings with 100,000 square feet of space housing our offices, manufacturing, R&D and all other integral areas that make STILLEN the leading source for car and truck performance products today. We offer a Dyno, Machine shop, Fabrication shop, Service Center, and Assembly line all in house to ensure we produce nothing but the highest quality products in the industry.


At the end of the day, AP Racing is an engineering company. They are very talented engineers who eat, sleep, breath, and live high performance. They didn't want to simply build a good looking caliper that would work well for the street- they wanted to build the best looking caliper that would outperform every other caliper in any environment it was in. To accomplish this, they paid close attention to detail, including how easy it is to change brake pads. With the pressure forged removable bridge pad, changes take a matter of minutes instead of hours like other big brake kits. The internal seals are rated for supercars like the Bugatti Veyron and McLaren MP4-12C where the cars are put through extreme driving and will undoubtedly see extensive high performance track use.

Unfortunately, one of the most overlooked parts of any vehicle is the braking system. We talk with customers every day who "need" 800 horsepower. And they "need" to increase the downforce on their vehicle. One of the most overlooked areas of the vehicle is always the braking system. Having 800 horsepower is a lot of fun, but what happens when you need to slow down that vehicle and that power? What happens when you're on the track, running 800 horsepower through slick tires getting tremendous grip and quickly overpowering the factory braking system? This is where the AP Racing big brake kits shine. STILLEN engineers each kit specifically for the vehicle it's intended for. This means the factory ABS system, traction control system, and suspension components remain unaltered and ready to perform at their best. Horsepower will put you in the lead on the first couple of laps - AP Racing big brakes will let you stay out front the rest of the race!

Research & Development

This is where it starts, where the ideas meet the road so to speak. The STILLEN R&D Center is a constant hub of activity that ultimately evolves into high performance products that become available to our customers and capture the attention of many automotive publications. STILLEN manufactures a wide array of products including: Supercharger Systems, Hi-Flow Intake Systems, Suspension Components and Exhaust Systems, to name a few. We also work with AP Racing to develop Big Brake Systems for many sports cars, trucks and SUVs. Every part of the manufacturing process is performed in-house including: prototyping development, tooling, CAD-CAM engineering and final production. The ability to R&D and manufacture STILLEN brand products allows us to maintain strict quality control. The R&D team doesn't stop at just development. Once a product has emerged from concept a lengthy series of tests are made to ensure that the product is the highest quality.

Warranty & Disclaimers


WARNING concerning driving: The fact that a vehicle is fitted with an AP Racing Big Brake Kit (whether RT, RT Forged, or Radi-CAL line) must never allow the driver to be tempted into taking risks which could affect the safety of either the driver or other road users. The addition of an AP Racing Big Brake Kit cannot overcome the consequences of trying to stop in too short a distance, cornering at too high a speed, or the risk of hydroplaning. The driver should always take road conditions into account. A slippery road always requires more braking distance for a given speed, even with an AP Racing Big Brake Kit. The driver must at all times remain compliant with all applicable laws and regulations and, in particular, ensure that the use of the AP Racing Big Brake Kit is fully compliant with those applicable laws and regulations.

WARNING concerning installation: Installation of any component or system should only be performed by persons experienced in the installation and proper operation of disc brake systems. These are high performance components which will not function as intended if misused or if not installed properly to the correct specifications. It is the responsibility of the individual installing any brake component or system to determine the suitability of the component or system for that particular application. It is the ultimate seller’s responsibility to ensure that the sale of the AP Racing Big Brake Kit is compliant with all applicable laws and regulations.

DISCLAIMER OF WARRANTY: AP Racing Ltd., (“Manufacturer”) warrants to the original user that this Product complies with Manufacturer’s published specifications and is free from manufacturing defects in materials and workmanship (a “Covered Defect”). This warranty is limited in duration to one (1) year from the date of purchase or such longer period required by law. In the event that a Covered Defect is claimed, a claim under this Limited Warranty must be made in writing within sixty (60) days from its discovery or the date on which it ought to have been discovered and within one (1) year from the date of purchase, or within such longer period required by law. If the Product is found to have a Covered Defect, the Product will be, in the Manufacturer’s sole judgment, either repaired or replaced by a new or rebuilt Product.


For products sold in the U.S., some states do not allow the exclusion or limitation of incidental or consequential damages, so one or more of the above limitations or exclusions may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other legal rights which vary from state to state.

All claims under this one year Limited Warranty must be made in writing within sixty (60) days following the discovery of the alleged Covered Defect and the claimed defective Product or defective part(s) must be returned to STILLEN, 3176 Airway Avenue, Costa Mesa, California 92626 through the distribution chain and transport prepaid, within the one year warranty period, or within such longer period required by law.

A statement of the defect must be included with the Product or parts returned, and proof of purchase by the original user identifying the Product and date of purchase (whether purchased at retail or sold by a dealer as part of the installation of the Product) must also be included.

This Limited Warranty does not apply to:

  • Any damage to the Product caused in whole or in part by abuse, accident, fire, chemical corrosion, use for other than its intended purposes, unlawful use, use in a model for which it was not designed, faulty installation, installation contrary to the Manufacturer’s published instructions, or failure to maintain the Product in accordance with the Manufacturer’s published instructions;
  • Claims relating to comfort, noise, vibration or harsh operating characteristics;
  • Claims made when repairs alterations or modifications have been made to the Product without the Manufacturer’s consent. This Limited Warranty sets forth the sole liability of Manufacturer hereunder, and it may not be changed by any employee, dealer, distributor of AP Racing or any other person.

The Product has been designed and manufactured for the specific model and application indicated in AP Racing’s catalogues or website (www.apracing.com). The Product shall be used in compliance with laws and rules in effect in the states and/or countries in which the vehicle in which the Product is installed will be operated, including but not limited to compliance with the applicable traffic rules and obtaining any prior necessary authorization/homologation, approval or license in such states and/or countries. The Manufacturer is relieved of any and all damages, claims and liabilities in case the use of the Product does not comply with such applicable laws and regulations.

By installing and using the Product the original user is deemed to have accepted the terms and conditions of this Limited Warranty. This Limited Warranty shall be governed, construed and interpreted in accordance with the laws of England and the United States.


This product is not intended to be used differently from the specific use for which they have been designed and manufactured. Use for any other purpose, or any modification to, or tampering with, the product can affect the performance of the product and may render it unsafe. Improper use may subject the individual using the product to liability for bodily injury or property damage to others.


“DANGER !” means procedures which, if not observed, have a high degree of probability that they will cause serious injury or even death. “WARNING !” means procedures which, if not observed, could possibly cause injury. “CAUTION !” means procedures which, if not observed, could result in damage to the vehicle.

  • DANGER ! This product is vital to the safe operation of the vehicle on which it is installed, and it is intended to be installed only by a skilled, qualified individual who has been trained and/or is experienced in the installation and use for which the product is intended. The installer must be equipped with the proper tools of his trade, and with the knowledge and experience to deal with vehicle repairs. Improper or incorrect installation, whether caused by a failure to faithfully and completely follow these instructions or otherwise, could subject the installer to liability in the event of personal injury or property damage. AP RACING shall not be liable for any damage or injury caused to or by any person operating a vehicle on which a replacement product has been improperly installed.
  • DANGER ! The used product replaced by this Product must not be installed on any other product. Property damage and personal injury, including death, could result.
  • WARNING ! In the course of replacing the product, and related items such as brake fluid, brake pads, brake shoes, and the like, the installer will be exposed to fluids and parts that may be deemed to be “hazardous waste” under applicable laws, rules and regulations. All such wastes must be handled, recycled and/or disposed if in accordance with all applicable laws, rules and regulations. The failure to do so can subject the generator of the hazardous waste to penalties under environmental laws, and could result in bodily injury or property damage to the generator or others.
  • DANGER ! Always check that the brake fluid level in the reservoir is between the minimum and maximum levels indicated on the reservoir. An incorrect level can cause brake fluid leaks or reduced brake system efficiency. Too much or too little brake fluid in the reservoir could cause the brakes not to perform properly, and personal injury, including death, could result.
  • WARNING ! To avoid creating a defective installation, avoid sharply striking and/or damaging the product, its parts and its components, as this can impair their efficiency and may cause them to malfunction. If necessary, replace and damaged part or component.
  • DANGER ! Avoid contact of grease and other lubricants with the braking surfaces of the discs, and pads as this could affect the efficiency of the braking system and cause serious physical damage.
  • CAUTION ! Check that the bearing seats are free from dirt. Any dirt resent can damage the seats during assembly operations and shorten bearing life.
  • CAUTION ! Do not use sharp tools when fitting rubber components, since this can damage them. Be sure to replace damaged components.
  • DANGER ! Install the FACTORY BIG BRAKE KIT braking system on both sides.

WARNING ! to avoid injury:

  • Use suitable equipment to prevent the inhalation of dust raised during cleaning of the parts.
  • Always wear gloves during disassembly and assembly of components with sharp edges.
  • Do not allow skin surfaces to make direct contact between the pad and shoe linings since this could cause abrasions.
  • Avoid direct contact with brake fluid as it can cause irritation to the skin and eyes. In the event of contact, clean thoroughly in accordance with the vehicle or brake fluid manufacturers’ instructions.
  • Ensure correct connection of any electrical contacts.


The operator can fit or service the product only if he has read and understood the following assembly instructions, has been specifically trained and is authorized by this company. Operators are not allowed to make structural modifications to the components.


STILLEN - Steve Millen Sportparts, Inc. 3176 Airway Avenue, Costa Mesa, California 92626

The brake system is a safety device; personnel performing any replacement or maintenance operations must be competent and certified.

STILLEN (“Manufacturer”) warrants to the original user that this AP Racing Big Brake Kit (RT, RT Forged, and World Radi-CAL series) by STILLEN (Product) complies with the Manufacturer’s published specifications and is free from manufacturing defects in materials and workmanship. This warranty is for one year (1 year) from the date of sale. Any warranty claim must be made within two months from its discovery and within one year (1 year) from the date of sale. If the Product is found to have a defect, the product will be repaired, replaced or credit issued. The Manufacturer will use its sole judgment to determine eligibility for warranty and method of remedy. This Limited Warranty gives you specific legal rights, and you may have other legal rights which vary from state to state. A proof of purchase by the original user identifying the Product and date of purchase (whether purchased at retail or sold by a dealer as part of the installation of the Product) must be produced on request and be included with the product to be evaluated for warranty. Lack of a proof of purchase may invalidate the warranty. This Limited Warranty does not apply beyond the product warranted. It explicitly does not apply to the following: 1) Any damage to the Product caused by in whole or in part by abuse, chemical corrosion, use for other than its intended purposes, unlawful use, use in a vehicle for which it is not intended, faulty installation or failure to maintain properly. 2) Claims relating to comfort, noise, vibration or harsh operating characteristics. 3) Claims made when alterations or modifications have been made to the product without consent from the manufacturer. 4) Claims relating to use on a closed-course circuit. This Limited Warranty sets forth the sole liability of Manufacturer and it may not be changed by any dealer, distributor or other person. This Limited Warranty shall be governed, construed and interpreted in accordance with U.S. Law.

Wheel Clearance Disclaimer: AP Racing have identified the actual size of the wheel necessary for a particular kit, and where possible have listed an example of an individual manufacturers specification, often other manufacturers wheels can be used, but inner wheel profile must be checked before fitment. It is usually the inner spoke area that causes the problem with fouling the outer face of the caliper. AP Racing does not recommend the use of a wheel spacer or removal of material from the caliper or wheel as a cure. We now have some of the most common Caliper Profile Drawings available. Please contact us to obtain a brake caliper template. You can use this video as a guide to show you how to use the template: https://youtu.be/pwxDPQDxhXE.

You also recognize and agree that neither Steve Millen Sportparts, Inc. (STILLEN) nor AP Racing Limited, United Kingdom ensures or in any way be liable for any loss, damage or injury arising from the use of these products and that you expressly waive any warrantees of claims relating to comfort, noise, vibration, maintenance or harsh operating characteristic. Motorsport is a dangerous activity. The user shall determine the suitability and safety for its intended use, and the user assumes all responsibility and risk in connection there with. Purchaser understands and agrees that no officer, director, employee of Steven Millen Sportparts, Inc. (STILLEN) has any authority to make any statement contrary to this agreement.

Warranty Addendums:

  • Damages caused by improper use, installation, modifications and/or collisions will be considered user-error and will NOT be covered under warranty.
  • User assumes all risks and costs associated with the use of STILLEN products.
  • Products purchased from un-authorized dealers will not be covered under warranty.
  • Warranties only cover the initial purchaser and will not transfer to second hand users.
  • Failure to provide the required invoice, images and/or warranty claim form will result in the denial of the warranty claim. NO EXCEPTIONS.
  • STILLEN is not responsible for fees associated with the installation/removal/servicing of components.
  • KEEP YOUR FACTORY PARTS. STILLEN will not provide temporary components to replace parts sent to STILLEN for inspection.
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