4-Piston Rear Big Brake Kit with Slotted Rotors

This rear kit features lightweight, one-piece calipers machined from aircraft-grade aluminum, equipped with aluminum pistons for enhanced heat resistance. The opposed piston design of the 4-piston calipers (standard on 13" and 14" systems) improves pad wear and caliper rigidity over OEM designs. The two-piece, 330mm slotted rotors are designed for fade-free performance on the track and comfortable operation during normal driving. Included with the kit are SC5 Street NAOC Ceramic brake pads, which offer optimal braking for street and occasional track use, reducing dust by 50% or more and minimizing noise and rotor wear. The system also incorporates DOT-compliant stainless-steel braided brake lines that prevent expansion under pressure, leading to quicker pedal response and a firmer pedal feel. Carbon steel caliper brackets are included to ensure a direct bolt-up to the OEM caliper bracket location. It is specifically designed for the 2004-2009 Mazda 3, including GS trims. While Ksport offers various caliper color options and rotor types (slotted or cross-drilled), this specific kit features slotted rotors. Ksport builds these kits to order, with an estimated production and delivery time of 4-6 weeks. All Ksport big brake kits come with a 12-month warranty covering manufacturer defects.