Rear Big Brake Kit with Slotted Rotors

The Ksport BKNS250-447SO is a high-performance rear big brake kit engineered to deliver superior stopping power with significantly reduced brake fade. The caliper design features a lightweight, one-piece opposed piston configuration with a differential bore. Machined from aircraft-grade billet aluminum, each caliper weighs just over 5 lbs. It includes aluminum pistons with high-temperature seals, stainless steel brake pad wear plates, and protection grooves for bridge tube durability. The opposed piston design enhances pad wear consistency and caliper rigidity over OEM components. The floating 2-piece rotor assembly reduces rotating and unsprung weight, while the floating construction prevents thermal stress-induced warping. The unique slot design efficiently expels gas and pad debris and minimizes braking noise. Rotors are heat-treated and balanced for optimal performance and longevity. This specific kit includes slotted rotors, recommended for frequent track use. Additionally, the kit incorporates stainless steel braided brake lines, which resist expansion under pressure to provide a firm and consistent pedal feel. This big brake kit is an ideal upgrade for drivers looking to measurably improve braking performance, fade resistance, and pedal feel on both the street and the track.