{"product_id":"radi-cal-competition-front-brake-kit-cp9668-372mm","title":"Radi-CAL Competition Front Brake Kit CP9668 372mm","description":"It features the advanced CP9668 Radi-CAL Pro5000R six-piston calipers, distinguished by their robust Electroless Nickel Plated (ENP) finish for exceptional durability and a jewel-like appearance. This comprehensive kit includes 372mm rotors and is designed to significantly reduce unsprung weight by 24 lbs compared to factory components, contributing to improved vehicle dynamics and handling.\n\nA key technological advancement in this kit is the inclusion of anti-knockback (AKB) springs. These springs mitigate pedal fade and “knockback” – a phenomenon where wheel and hub deflection can push pistons back into their bores, creating slack in the brake system. By maintaining tension on the back of the pistons, AKB springs ensure a firmer pedal feel and quicker brake engagement, especially crucial in demanding braking zones.\n\nThe calipers are equipped with high-temperature piston seals, a design proven in top-tier racing series like NASCAR. Unlike conventional dust boots that can quickly degrade under high heat, these specialized seals are formulated to withstand extreme temperatures, offering superior longevity and reduced maintenance requirements. Pad replacement is streamlined via bridge bolts accessible with a 6mm hex wrench, and the CP9668 model further enhances convenience with an optional quick-change spring clip for rapid pad swaps between sessions.\n\nFurther enhancing performance and durability, the Pro5000R calipers utilize machined stainless steel pistons with a domed back for increased stiffness and ventilated edges for improved cooling. This design actively repels heat, preventing brake fluid fade and boiling. The accompanying two-piece floating J Hook rotors feature an aluminum hat with oblong mounting holes, allowing for controlled thermal expansion to prevent disc distortion, cracking, and uneven pad wear. Essex Parts Services offers a lifetime professional reconditioning service for these calipers, ensuring they remain in peak condition throughout their lifespan. This kit is compatible with F87 M2 \u0026amp; M2 Competition, F80 M3, and F82 M4 models.","brand":"AP Racing","offers":[{"title":"Default Title","offer_id":52686955807032,"sku":"13.01.10046","price":5699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660676002.jpg?v=1784878887","url":"https:\/\/store.motormia.co\/products\/radi-cal-competition-front-brake-kit-cp9668-372mm","provider":"MOTORMIA","version":"1.0","type":"link"}