- Wheels & Tires
BRAKE UPGRADE INCLUDES:
STILLEN is excited to announce the AP Racing World Radi-CAL II by STILLEN big brake kit for BMW Z4, E85, E86 chassis. This big brake kit consists of 4 piston rear calipers, 360x28mm (14.2”x1.1”) 2 piece floating rotors, high performance brake pads, billet aluminum mounting brackets and braided stainless steel brake lines.
During their dynamic testing they noticed that the caliper was actually twisting diagonally due to the forces created by the RPM and mass of the rotor interacting with the friction created by the application of the brake pads. The solution was to reinforce and stiffen the caliper in key locations to counteract this force.
Options & Styles
Choosing the best big brake kit for your BMW Z4 just became extremely easy, with the introduction of the next generation of braking performance; The AP Racing Radi-CAL II 4 Piston Brake System by STILLEN. This show-quality setup will catch anyone's eye, and has the performance to back it up. Now you can benefit from this brake technology on your Z4, and have the braking confidence formerly available only to top motorsport teams.
The AP Racing designed Radi-CAL II calipers are FORGED versus the major competitor's cast calipers. These FORGED calipers are 25% lighter and 20% stronger than cast calipers of the same size in the same performance category. Taking this born-from-motorsports technology, STILLEN Engineers utilize AP Racing Rotors and the new AP Racing Forged Radi-CAL 6-piston calipers for the front and 4-piston calipers in the rear to develop these new brake kits designed specifically for your BMW Z4. All of the mounting hats and brackets are designed and made in-house at STILLEN's machine shop, using the latest technology in CNC Lathe and Mill machining. Caliper configuration, pad selection and proper rotor sizing are all chosen for the E85, E86, Z4 to produce maximum braking performance, with a striking look no enthusiast could miss.
The entire Radi-CAL II system was created from the Radi-CAL system designed by AP Racing for Formula 1 and NASCAR. AP Racing has been dominating the highest level of motorsports for over 50 years, such as Formula 1, NASCAR Sprint Cup, ALMS, World Rally Championship (WRC) and many others.. and most importantly winning.
Read more about AP Racing Radi-CAL by STILLEN.
CLICK THE IMAGE ABOVE TO READ OUR BLOG ABOUT AP RACING RADI-CAL II BY STILLEN
For over 50 years, AP Racing has had one aim - to create winners on the race track. The world of motorsport has changed out of all recognition since those early days and AP Racing have spearheaded every major development in brake and clutch technology. In Grand Prix Racing our success started with the incredible Auto Unions and has continued uninterrupted ever since to the championship winning Williams, McLarens, Renaults, and Ferraris. Over the years this success has been repeated in all other types of Single Seaters including Champ Cars, Indy Racing League, Indy Lights, GP2, F3000, F3 etc. At the end of the 2011 season AP Racing had notched up an incredible 686 GP wins for cars using its Brakes and/or Clutches and are confident of increasing this tally in 2012. At the pinnacle of motor sport, numerous factors dictate the most specialized requirements for ultimate success. From the state of the art 3 dimensional solid modelling/design and Finite Element Analysis CAD facilities, to sophisticated research, development and testing including special dynamometers that simulate true racing speeds, AP Racing is constantly probing the boundaries of technology. From state of the art measuring centers, CNC machining and sophisticated stock control systems, to the intricate hand assembly, checking and testing of individual assemblies, AP Racing ensures its products perform when pushed to the absolute limits.
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