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Ksport BKBM115-863SO SuperComp Big Brake Kit 8-Piston Slotted Rotors

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

Manufacturer

Part Number

BKBM115-863SO
Sale Price

$4,334.14

Estimated ship date Saturday, November 21

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Ksport BKBM115-863SO SuperComp Big Brake Kit is Ksport's most extreme bolt-on brake upgrade, engineered to deliver maximum stopping power while significantly reducing brake fade. Advanced brake technology continuously cools and refreshes the pad surface during braking, maintaining consistent performance under hard use. The system is designed for straightforward installation requiring minimal tools in most applications.

SuperComp Caliper Design:

  • Differential bore configuration with significantly larger pistons than the ProComp series
  • Forged from aerospace-grade 6061-T6 billet aluminum — weighs just over 7 lbs. each
  • One-piece construction eliminates weak points from casting or welding, providing uniform strength throughout the caliper block
  • Machined-in protection grooves for bridge tubes
  • Aluminum pistons for superior heat resistance and consistent operation
  • High-temperature seals rated for racetrack conditions
  • Titanium brake pad retainer clips and stainless steel brake pad wear plates standard
  • Opposed piston design improves pad wear evenness and caliper rigidity over OEM
  • 4 brake pads per caliper due to the caliper's larger footprint

2-Piece Floating Disc Assembly:

  • Standard full-floating rotor design reduces both rotating and unsprung weight
  • Floating disc construction prevents thermal stress from warping the disc or cupping the braking surface
  • Two-piece rotors can weigh up to 50% less than OEM rotors of the same diameter
  • Unique slot design expels gas and pad debris faster than conventional slot patterns, reducing braking noise
  • Every rotor is heat treated and precision balanced before shipment
  • Available in Cross Drilled (recommended for daily-driven vehicles — runs cooler) or Slotted (recommended for track-focused use)

Brake Lines & Hardware:

  • D.O.T.-compliant stainless steel braided brake lines included — resist expansion under pressure for a firmer, more responsive pedal feel
  • CNC machined carbon steel caliper brackets allow direct bolt-up to the OEM caliper bracket location

Included Brake Pads:

  • SC5 Street Pads (standard): NAOC ceramic compound optimized for street and occasional track use; operating range 194°F – 1,022°F; average coefficient of friction 0.46–0.53; reduces brake dust by 50% or more vs. race pads
  • RC5 Race Pads (optional upgrade): Carbon metallic compound for maximum track stopping power; operating range 482°F – 1,472°F; not recommended for street use

What's Included: Calipers, floating brake disc, brake pads (SC5 street pads), D.O.T. stainless steel brake lines, CNC caliper brackets, and all required hardware.

Warranty: Backed by Ksport's 12-month limited warranty covering manufacturer defects. Kits are built to order.

Products specifications

Fits

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

Subject to CARB? Yes/No

No

Rotor Type

Floating

Anti-Rattle Spring Included

Yes

Rotor Diamater (mm)

400

Caliper Type

8 Piston

Ksport Product Category

Big Brake Kits

Disc Brake Rotor Construction

Vented

Rotor Outside Diameter

15.7 IN

Caliper Slides Included

Yes

Caliper Piston Quantity

8

Position

Rear

Friction Material Composition

Ceramic

Rotor Style

Slotted

Rotor Width mm

36

Caliper Inlet Port Diameter

M10 x 1

Rotor Diamater (in)

15.7

Pad Shims Included

No

Ksport Product Sub-Category

Supercomp Big Brake Kit

Color

Orange

Surface Type

Slotted

Easy process!!!

GREAT!! The flasher so far is working great! You said it would fit and it DID!!! Thanks so much! I will be shopping your site when I need items that you sell in the future!! Your price was so much better than local auto supply stores and even better than I found on Ebay! AWESOME!!! ***** FIVE STARS to YOU!!!!

Awesome.

Easy site to use!

Fist time order here happy so far

The quality of the product is as expected and delivery was fast. Will be visiting Autoplicity.com in the near future.

Great first time customer

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