Ksport

Supercomp Big Brake Kit, Rear

$2,386.52

SKU: BKSB020-437SO

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Ksport Supercomp Big Brake Kit is engineered to significantly upgrade the braking performance of your Subaru Forester (2003-2007). This kit provides superior stopping power, reduces brake fade during demanding use, and actively cools and refreshes the brake pad surface. The kit includes a lightweight, one-piece caliper constructed from aircraft-quality billet aluminum. This caliper features a differential bore configuration, measures just over 5 lbs, and includes protection grooves for bridge tubes. Standard features also include aluminum pistons, high-temperature seals, and stainless steel brake pad wear plates. The opposed piston caliper design enhances pad wear and caliper rigidity compared to OEM systems. Stainless steel brake lines are incorporated to prevent expansion under pressure. The rotors utilize a 2-piece disc assembly, which reduces both rotating and unsprung weight. A floating disc option is available to mitigate thermal stresses that can cause warping. The unique slot design on the rotor helps minimize braking noise and efficiently expels gas and pad debris. All rotors are heat-treated and balanced for maximum performance. Cross-drilled rotors are recommended for daily driving as they run cooler, while slotted rotors are better suited for track use. This specific kit (BKSB020-437SO) is designed for the rear of the Subaru Forester 2003-2007 and requires the vehicle to have a 290mm OEM Front Rotor. The kit includes replacement calipers, rotors (330mm diameter, 32mm width, slotted, floating type), pads, brake lines, and all necessary hardware. Calipers are available in standard colors like Orange, Red, Yellow, and Black, with over 20,000 custom color options available. All Ksport big brake kits come with a 12-month warranty against manufacturer defects.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandKsport
Part NumberBKSB020-437SO
CategoryBrakes

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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