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Ksport

Aircraft-Grade Aluminum Big Brake Kit

$4,065.60 $3,862.32 Save $203.28

SKU: BKSB050-951SO

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

Moderate — 2–4 hours

Overview

The Ksport Supercomp Big Brake Kit is an extreme brake upgrade designed for the Subaru Impreza STI 1993-2001. It provides a high level of stopping power without requiring vehicle modifications for installation. The kit features larger calipers and rotors than standard Procomp kits, with standard full-floating rotors for better self-centering. All calipers are constructed from a solid billet of aircraft-grade aluminum for strength and corrosion resistance, and include aluminum pistons for improved heat resistance.
Show original supplier description
The calipers are constructed from a solid billet of aircraft-grade aluminum, offering a lightweight yet incredibly strong and corrosion-resistant foundation. Each caliper houses aluminum pistons, which enhance heat resistance and promote smoother operation. This design, combined with an opposed-piston caliper layout, dramatically improves pad grip and minimizes uneven pad wear, ensuring consistent performance under demanding conditions. Key features of this kit include 380mm (15-inch) diameter, 2-piece vented and slotted cast iron rotors with aluminum centers to reduce rotational mass and improve braking response. The kit comes with street-performance pads and heavy-duty caliper seals suitable for sustained high-temperature use. Reinforced carbon steel caliper brackets ensure these larger-than-OEM calipers bolt directly onto the factory mounting points without requiring modifications. Stainless steel brake lines are included to prevent expansion under high temperatures and pressures, leading to a firmer and more responsive pedal feel. The minimum wheel diameter required is 19 inches (482.6mm). This big brake kit is specifically designed for the 1993-2001 Subaru Impreza STI models.

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 NumberBKSB050-951SO
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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