Drilled rotor style referenceSpecial order · Estimated lead time: typically 2-4 weeks
98-05 Lexus GS400 - Front 3 Piston Big Brake Kit w/ 13.8 in. Drilled Rotors - Slimline
Choose year, make and model to confirm this application-specific product fits — you can add it to your cart either way.
Verify fitment- Two 3-piston Slimline calipers (front axle)
- Two 13.8 in two-piece cross-drilled rotors with aluminum center bells
- SC5 street brake pads
- Stainless-steel braided brake lines
- CNC-machined caliper mounting brackets and hardware
One approved application: 1998–2005 Lexus GS400 · JZS161
Choose an available option for each required item to enable Add to cart: Choose Caliper Color, Street or Race Pads, Center Bell Upgrades. Options marked “Contact for quote” require a KSport quote and cannot be added directly.
- Ships from Mesa, AZ
- 12-month limited warranty
- Special order: typically 2-4 weeks
Specifications — BKLX050-342CO
Product details
A 1998-2005 Lexus GS400 (JZS161) front axle can take this 13.8 in cross-drilled Slimline kit, which pairs 3-piston calipers with two-piece rotors that have aluminum center bells. It is a front-only package for the GS400. The cross-drilled face gives the front a drilled look, and the caliper keeps a compact profile.
Two 3-piston Slimline calipers, two 13.8 in cross-drilled rotors, and SC5 street brake pads are included. The calipers use one-piece billet aluminum construction, and the Slimline design is described as a single-side piston caliper that fits behind wheels with limited clearance.
Note that the OEM handbrake will not function with this kit. Run the year, make and model checker for the GS400 application and match part number BKLX050-342CO before ordering. Caliper color and optional center bell upgrades are chosen during configuration.
Supported features
A single-side piston caliper that keeps the styling of the multi-piston calipers while fitting behind wheels with limited clearance.
Extremely lightweight two-piece rotors — commonly up to 50% lighter than OEM rotors of the same size.
Calipers, floating brake discs, SC5 street pads, owner's manual, and all required hardware come standard.
CNC-machined carbon steel brackets let the calipers bolt to the OEM caliper bracket location.
Cross-drilled rotors run cooler for daily-driven vehicles; slotted rotors are recommended for more track use.
Standard painted orange, red, black, and yellow; premium high-polish silver, gold, and titanium; glassy and hard-anodized finishes; over 20,000 custom colors on request.
Compatible applications (3)
Choices for this kit
This part number ships with cross-drilled rotors. Cross-drilled runs cooler and suits daily driving; the slotted version of this kit suits track use. Both versions are listed on the Slimline page.
Painted KSport orange, race red, caution yellow or jet black at no extra charge. Premium high-polish, glassy and hard-anodized finishes cost extra.
Street pads are standard; race pads, titanium or twin-colour anodized center bells are optional upgrades.
Choose the caliper finish, pads and center-bell configuration above. Every selection and any extra charge is shown before Add to Cart and saved with the order. Contact KSport for a custom color quote.
Installation
Bolt-on installation with the supplied brackets; no vehicle modification on most applications. After fitting, bed the pads in: on a clear road, ten light-to-medium stops from 30–45 mph, three seconds each, at least a quarter mile apart. Some noise before the brakes warm up is normal for big brake kits.
Brake system support and bed-in procedureWarranty & service
12-month limited warranty to the original purchaser against defects in materials and workmanship. Racing use, exterior finish and improperly installed or modified parts are not covered; keep your original invoice for any claim. Small surface cracks on cross-drilled rotors are normal wear and not a defect. Replacement pads, rotors, lines and hardware are sold individually.
Warranty terms and service requestsOther published pages for MPN BKLX050-342CO
These page names share this MPN; they do not confirm fitment. Verify your vehicle before ordering.