Ksport

Dualcomp Rear 4-Piston Big Brake Kit

$4,224.41

SKU: BKBM321-445SO

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

Description

This rear kit utilizes a single 4-piston caliper where two pots are dedicated to the foot brake and the other two are for the handbrake, each operating on its own independent system. Constructed with CNC-machined carbon steel caliper brackets, this kit ensures a direct bolt-on installation to your OEM caliper bracket location. A polished titanium handbrake cylinder and lever are included for enhanced aesthetics and control. The kit comes standard with SC5 Street Pads, offering optimal braking performance for street and occasional track use, while reducing dust and noise. DOT-compliant stainless-steel braided brake lines are also standard, providing a quicker pedal response and firmer pedal feel by preventing expansion under pressure. Ksport provides customization options for the brake calipers, including standard painted colors like Orange, Red, Black, and Yellow, with upgrades available for premium high polish finishes in Silver, Gold, and Titanium, as well as various custom color finishes. Buyers can choose between Slotted or Cross Drilled rotors; Cross Drilled rotors are recommended for daily driven vehicles due to cooler running temperatures, while Slotted rotors are recommended for track use. This kit is built to order, requiring a production and delivery time of 4-6 weeks. It is compatible with 2014-2018 Mini Cooper S models. Ksport Big Brake kits are confirmed to fit 2WD vehicles only unless otherwise stated.

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 NumberBKBM321-445SO
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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