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Ksport BKBM115-443SO Big Brake Kit with Floating Rotor and 4, 6, or 8 Piston Caliper Options

(2009-2010 BMW 535i xDrive; 2008 BMW 535xi)

Manufacturer

Part Number

BKBM115-443SO
Sale Price

$2,688.26

Estimated ship date Monday, November 23

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Ksport BKBM115-443SO Big Brake Kit is a high-performance, bolt-on brake upgrade engineered to dramatically improve stopping power while reducing brake fade under sustained high-heat conditions. Featuring advanced brake technology and a floating two-piece rotor design, this kit delivers superior thermal management and consistent braking performance for both street and track applications.

Caliper Construction:

  • Extremely lightweight one-piece caliper in a differential bore configuration
  • CNC machined from aircraft-grade billet aluminum — each caliper weighs just over 5 lbs.
  • Machined-in bridge tube protection grooves for added structural integrity
  • Opposed piston design significantly improves pad wear evenness and caliper rigidity over OEM
  • Aluminum pistons with high-temperature seals for heat resistance and reliable operation
  • Stainless-steel brake pad wear plates standard on every caliper
  • Available in 4, 6, or 8 piston configurations to suit your performance needs

Rotor Technology:

  • Two-piece floating disc assembly reduces both rotating and unsprung weight
  • Floating rotor design prevents thermal stress from warping the disc or cupping the braking surface
  • Unique slot pattern expels gas and pad debris faster than conventional slot designs, minimizing brake noise
  • Every rotor is heat treated and precision balanced prior to shipment
  • Cross drilled rotors run cooler — recommended for daily-driven vehicles
  • Slotted rotors are recommended for frequent track or performance driving use

Brake Lines & System Features:

  • D.O.T.-compliant stainless-steel braided brake lines resist expansion under pressure
  • Braided lines provide quicker pedal response and a firmer pedal feel versus stock rubber lines
  • Designed for easy bolt-on installation with minimal tools required in most applications
  • OEM ABS systems remain fully functional with this brake kit
  • Backed by a 12-month manufacturer's warranty covering defects

The Ksport BKBM115-443SO big brake kit is built to order and available with multiple caliper finish and rotor style options, making it a versatile upgrade for drivers seeking enhanced braking confidence on the street or track.

Products specifications

Fits

2009-2010 BMW 535i xDrive; 2008 BMW 535xi

Rotor Diamater (in)

14

Caliper Piston Quantity

4

Pad Shims Included

No

Rotor Width mm

32

Friction Material Composition

Ceramic

Rotor Style

Slotted

Position

Rear

Rotor Diamater (mm)

356

Color

Orange

Rotor Outside Diameter

14 IN

Caliper Slides Included

Yes

Disc Brake Rotor Construction

Vented

Caliper Type

4 Piston

Ksport Product Sub-Category

Procomp Big Brake Kit

Subject to CARB? Yes/No

No

Surface Type

Slotted

Anti-Rattle Spring Included

Yes

Caliper Inlet Port Diameter

M10 x 1

Rotor Type

Fixed

Ksport Product Category

Big Brake Kits

Easy order. We’ll have to see how fast it delivers.

Quick and easy.

I think for the part I ordered the shipping price was too high. Needed the part so had to do it.

Great customer support. Easy to talk too as well. Thanks again!

Quick and easy

product arrived on time and in good condition.

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