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Ksport

8-Piston Billet Aluminum Big Brake Kit

$3,017.30 $2,605.97 Save $411.33

SKU: BKSB120-846CO

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

It features larger-diameter disc rotors and 8-piston calipers constructed from a solid billet of aircraft-grade aluminum for light weight, unparalleled strength, and corrosion resistance. Aluminum caliper pistons offer better heat resistance and smoother operation.
Show original supplier description
The Ksport SuperComp Big Brake Kit is K-Sport's most extreme brake upgrade, engineered to deliver the highest level of stopping power with larger-diameter disc rotors and an 8-piston caliper design. Constructed for durability and performance, the calipers feature a 1-piece billet aircraft-grade aluminum body for light weight and exceptional strength, while aluminum pistons resist corrosion and improve heat management. The 2-piece vented rotors, made from cast iron with an aluminum center, reduce rotational mass, enhance braking response, and shorten stopping distances. The 2-piece design also minimizes rotor warpage by allowing for more natural expansion and contraction. The kit includes reinforced carbon steel caliper brackets that allow these larger-than-OEM calipers to mount directly to existing points. For sustained high-temperature use, all caliper seals are heavy-duty, and stainless steel brake lines are included to prevent expansion under pressure, ensuring faster pedal response. This big brake kit requires a minimum wheel diameter of 18 inches (457mm) and features 14-inch (356mm) drilled rotors. The kit is specifically designed for the 2005-2007 Subaru Impreza STI.

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 NumberBKSB120-846CO
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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