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Ksport

Slimline 12-inch Big Brake Kit

$2,359.09

SKU: BKSB120-322CO

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

Moderate — 2–4 hours

Overview

The Ksport Slimline Big Brake Kit is a performance upgrade for the 2005-2007 Subaru Impreza STI. It features 3-piston calipers and 12-inch drilled, vented rotors. The kit is designed with a slim caliper to fit aggressive factory or aftermarket wheels with limited clearance.
Show original supplier description
The Ksport Slimline Big Brake Kit is engineered to provide enhanced braking performance for the 2005-2007 Subaru Impreza STI. This kit addresses the challenge of fitting aftermarket big brake kits with aggressive wheel fitments, where large multi-piston calipers often conflict with limited wheel spacing. Ksport developed the Slimline Caliper with a design based on OEM single-side piston caliper thickness, ensuring compatibility with most factory wheels or those with very tight brake caliper clearance. The brake caliper is forged from aluminum and offers a larger brake pad surface area compared to OEM pads for improved stopping power. The 2-piece slotted rotors are constructed with an aluminum center to reduce rotational mass, leading to quicker braking response and shorter stopping distances. This construction also significantly reduces the chance of rotor warpage by allowing for more unrestricted expansion and contraction of the outer iron section. The kit includes stainless steel brake lines that resist expansion under high temperatures and pressures, contributing to faster pedal response. Key specifications include 304mm (12-inch) diameter drilled and vented rotors, 3-piston calipers in an orange finish, and street-performance brake pads. The minimum required wheel diameter is 406.4mm (16 inches). The kit is intended for performance and racing driving styles.

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 NumberBKSB120-322CO
CategoryBrakes
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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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