Ksport

Supercomp Big Brake Kit

$2,625.17

SKU: BKLX050-437SO-1

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

Description

The Ksport Supercomp Big Brake Kit represents the pinnacle of braking performance for your 1998-2005 Lexus GS300, GS400, or GS430. Engineered as an extreme upgrade, this kit delivers unparalleled stopping power through a sophisticated, bolt-on design that requires no permanent vehicle modifications. It builds upon the benefits of Ksport's Procomp kit, incorporating larger calipers, rotors, and brake pads, an increased number of pistons, and standard full-floating rotors that enhance self-centering capabilities and reduce drag for optimal performance. Constructed from a solid billet of aircraft-grade aluminum, the one-piece caliper design ensures lightweight strength and superior corrosion resistance. These calipers also feature aluminum pistons, which provide superior heat resistance and maintain uncompromised operation under demanding conditions. Furthermore, the floating two-piece rotor design allows for slight adjustments, improving caliper centering, reducing brake drag, and ensuring more even brake application. This Supercomp kit comes standard with SC5 Street Pads, offering optimal braking performance for both street driving and occasional track use. These ceramic pads significantly reduce brake dust (by 50% or more) and noise compared to race pads, while also minimizing rotor wear. They perform optimally within a temperature range of 194°F - 1022°F. Additionally, the kit includes D.O.T. compliant stainless-steel braided brake lines, which eliminate expansion under pressure for a quicker pedal response and a firmer pedal feel compared to stock rubber lines. Buyers can choose between slotted or cross-drilled rotors; slotted rotors are recommended for track use, while cross-drilled rotors offer cooler operation suitable for daily drivers. This Big Brake kit is specifically designed for 2WD vehicles. Ksport Big Brake kits are built to order and typically require a production and delivery lead time of 4-6 weeks. Fitment is confirmed for the Lexus GS300, GS400, and GS430 models within the 1998-2005 model years, utilizing the JZS161 Chassis.

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 NumberBKLX050-437SO-1
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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