Ksport

356mm 4-Piston Big Brake Kit

$3,207.60

SKU: BKSB040-447SO

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

Description

The calipers are constructed from a solid billet of aircraft-grade aluminum, offering a lightweight yet incredibly strong and corrosion-resistant build. They feature aluminum pistons that enhance heat resistance and ensure smoother operation. The brake rotors are a 2-piece, vented, and slotted design with a 356mm (14") outside diameter and a cast iron construction. Reinforced carbon steel caliper brackets allow for a direct bolt-on installation without modifications to existing mounting points. Key benefits include an opposed-piston caliper design that greatly improves pad grip and reduces uneven wear. The 2-piece rotor design with an aluminum center reduces rotational mass, quickens braking response, and shortens stopping distances, while also minimizing the chance of rotor warpage. Heavy-duty caliper seals are integrated for sustained high-temperature racetrack use. Additionally, stainless steel brake lines prevent expansion under high temperatures and pressures, leading to faster pedal response. A minimum wheel diameter of 457mm (18") is required for fitment. This kit is specifically designed for the 2002 – 2007 Subaru Impreza WRX. The kit includes two SuperComp Big Brake Kits and comes with the manufacturer's standard warranty.

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 NumberBKSB040-447SO
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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