Ksport

Supercomp Rear Big Brake System

$2,770.56

SKU: BKIN300-447SO-2

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

Description

The Ksport Supercomp Infiniti Q70 Rear Big Brake System is engineered as an extreme brake upgrade, delivering the highest level of stopping power while maintaining a simple bolt-on installation with no vehicle modifications needed. This sophisticated system builds upon the benefits of Ksport's Procomp kits, incorporating larger calipers, rotors, and brake pads, along with increased piston count and standard full-floating rotors for improved self-centering within the caliper. Constructed from a solid billet of aircraft-grade aluminum, the one-piece caliper design ensures lightweight strength and corrosion resistance. The calipers feature aluminum pistons for superior heat resistance and uncompromised operation, aided by an opposed-piston design for consistent pad wear. High-temperature seals, titanium brake pad retainer clips, and stainless-steel brake pad wear plates are standard. The two-piece design reduces warping due to heat and the aluminum center bell acts as a heat sink, extending rotor service life. Slotted rotors are recommended for track use, while cross-drilled rotors are suggested for daily driving. The standard kit includes (2) forged, monoblock aluminum calipers, (2) lightweight two-piece rotors (slotted or drilled), (1) set of SC5 Street Brake Pads, (2) stainless steel brake lines, and all necessary mounting components and hardware. DOT-compliant stainless-steel braided brake lines are included to prevent line expansion under pressure, resulting in quicker pedal response and a firmer pedal feel. The included SC5 Street Pads offer optimal performance for street and occasional track use, with reduced dust and noise. An upgrade to RCI Race Pads is available for extreme track conditions. The kit is backed by a 12-month limited warranty covering manufacturer defects. Please note that Ksport Big Brake kits are built to order, with production and delivery typically taking 4-6 weeks.

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 NumberBKIN300-447SO-2
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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