{"product_id":"supercomp-rear-8-piston-big-brake-kit","title":"Supercomp Rear 8-Piston Big Brake Kit","description":"The Ksport Supercomp Rear Big Brake Kit offers the ultimate in stopping power for your BMW E85\/E86 Z4. This kit integrates advanced brake technology to significantly reduce brake fade and ensure continuous cooling of the brake pads during demanding use. The SuperComp caliper is forged from aircraft-quality billet aluminum, featuring a differential bore configuration with larger pistons than Ksport's ProComp calipers. It weighs just over 7 lbs and includes protection grooves, aluminum pistons, high-temperature seals, titanium brake pad retainer clips, and stainless-steel wear plates. The opposed piston design enhances pad wear and caliper rigidity, while stainless-steel brake lines prevent expansion under pressure. Due to the caliper size, each utilizes four brake pads.\n\nThis system includes a 2-piece floating disc assembly, which reduces both rotating and unsprung weight. The floating design mitigates thermal stress, preventing disc warping and surface cupping. Its unique slot design minimizes braking noise and efficiently expels gas and pad debris. Rotors are heat-treated and balanced for optimal performance. Cross-drilled rotors are recommended for daily drivers due to cooler operation, while slotted rotors are better suited for track use.\n\nStandard equipment includes Ksport SC5 Street Pads, which are NAOC ceramic pads designed for optimal performance on the street and occasional track use. These pads offer fast warm-up, reduced dust (by 50% or more compared to race pads), and lower noise and rotor wear. For those seeking maximum performance on the track, optional Ksport RC5 Race Pads (carbon metallic) are available, though not recommended for street use due to their higher optimal operating temperatures (482°F – 1472°F).\n\nD.O.T. compliant stainless-steel braided brake lines are also standard, improving pedal feel and response time. All Ksport big brake kits are covered by a 12-month limited warranty against manufacturer defects. This product is made to order and is non-refundable once placed.","brand":"Ksport","offers":[{"title":"Default Title","offer_id":52868440949048,"sku":"BKBM140-863CO","price":4767.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687986209.jpg?v=1787914207","url":"https:\/\/store.motormia.co\/products\/supercomp-rear-8-piston-big-brake-kit","provider":"MOTORMIA","version":"1.0","type":"link"}