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Ksport

Procomp Rear Big Brake Kit

$2,858.90 $2,468.81 Save $390.09

SKU: BKBM030-443CO

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

Moderate — 2–4 hours

Overview

The Ksport Procomp Rear Big Brake Kit is a sophisticated bolt-on brake upgrade designed for the BMW E46 3-Series (1999-2005, excluding 330 and xi models). This kit enhances brake power under sustained high-heat conditions. It features lightweight, forged one-piece calipers with aluminum pistons and high-temperature seals for durability and consistent performance.
Show original supplier description
The Ksport Procomp Rear Big Brake Kit provides the ultimate in stopping power for your BMW E46 3-Series (1999-2005 models, excluding 330 and xi variants). The kit includes replacement calipers, rotors, pads, brake lines, and associated hardware for a comprehensive solution. Constructed from aerospace-quality aluminum, the one-piece forged calipers are exceptionally lightweight yet incredibly strong, eliminating weak spots common in cast or welded designs. Opposed-piston design ensures consistent brake pad wear, while aluminum pistons with heavy-duty seals handle high temperatures effectively. The two-piece rotor design, also lightweight, is crafted from 6061-T6 aircraft-grade aluminum for reduced rotational mass and improved heat dissipation, minimizing warping potential. This kit offers customization options, including caliper color choices (standard and premium finishes), pad selection (Street or Race), and optional upgrades like a Titanium Center Bell and Hardware. It includes SC5 Street Pads as standard, with an option to upgrade to RCI Race Pads for extreme track conditions. The kit also features D.O.T. compliant stainless-steel braided brake lines, which enhance pedal response and feel compared to stock rubber lines. It is important to note that Ksport Big Brake Kits are made-to-order and non-refundable. The Ksport Procomp Big Brake kits fit 2WD vehicles only and specifically exclude 330 and xi models for the BMW 3 Series E46 (1999-2005).

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 NumberBKBM030-443CO
CategoryBrakes
5,000+ Trusted brands
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5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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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