{"product_id":"4-piston-356mm-slotted-big-brake-kit","title":"4 Piston 356mm Slotted Big Brake Kit","description":"Designed for direct fitment on the E46 chassis, this rear brake kit offers a significant upgrade over stock systems.\n\nThe ProComp caliper, machined from aircraft-quality billet, features a lightweight construction (just over 5lbs) with differential bore and protection grooves. It is equipped with aluminum pistons, high-temperature seals, and stainless steel wear plates. The opposed piston design enhances caliper rigidity and improves pad wear. Stainless steel brake lines are included to eliminate expansion under pressure, ensuring consistent braking performance.\n\nThis kit utilizes a 2-piece floating disc assembly, which reduces both rotating and unsprung weight. The floating design also helps manage thermal stresses from extreme heat, preventing disc warping and surface cupping. The slotted rotor design actively reduces braking noise and efficiently expels gases and pad debris, while heat-treated and balanced rotors ensure optimal performance. Slotted rotors are recommended for track use, offering superior performance in demanding conditions.\n\nThis specific kit, BKBM030-443SO, is designed for the rear position and features a 356mm (14in) diameter rotor with a slotted surface and a red 4-piston ProComp caliper.","brand":"Ksport","offers":[{"title":"Default Title","offer_id":52868429971768,"sku":"BKBM030-443SO","price":2468.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687986011.jpg?v=1787914065","url":"https:\/\/store.motormia.co\/products\/4-piston-356mm-slotted-big-brake-kit","provider":"MOTORMIA","version":"1.0","type":"link"}