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Ksport

6-Piston Front Big Brake Kit

$2,223.10 $2,112.21 Save $110.89

SKU: BKBM090-831CO

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

Moderate — 2–4 hours

Overview

It features a one-piece forged caliper construction from aerospace-quality aluminum for exceptional strength and light weight. This kit includes two-piece rotors for fade-free performance and effective grip, along with aluminum pistons that offer better heat resistance.
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Constructed from aerospace-quality aluminum, the one-piece forged calipers provide unparalleled strength, light weight, and corrosion resistance. The calipers feature aluminum pistons protected by heavy-duty seals capable of withstanding racetrack temperatures. An opposed-piston design ensures consistent brake pad grip and wear, while high-temperature seals, titanium brake pad retainer clips, and stainless-steel wear plates are standard. The kit includes lightweight two-piece rotors, available in drilled or slotted styles, crafted from 6061-T6 aircraft-grade aluminum center sections. This design reduces rotational mass for improved brake response and minimizes rotor warping due to heat expansion. Ksport recommends cross-drilled rotors for daily drivers due to their cooler operation, while slotted rotors are suggested for vehicles seeing more track time. Standard equipment includes D.O.T. compliant stainless-steel braided brake lines for improved pedal response and feel, as well as SC5 Street Pads for optimal street and occasional track use. An upgrade to RCI Race Pads is available for extreme track conditions. This kit is made to order and is non-refundable. It is compatible with BMW E90, E91, E92 3-Series models from 2006-2013. The big brake kits fit 2WD vehicles only and excludes AWD sedan models until 2011.

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 NumberBKBM090-831CO
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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