Stoptech 127.44090R Disc Brake Rotor - Rear Right

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.44090R) are engineered for Lexus GS300, GS400, GS430, IS300, and SC430 models. These solid rotors feature a slotted and drilled surface design to enhance braking performance and heat dissipation under demanding conditions.

• Cross-drilled and slotted surface for improved heat dissipation and brake pad cleaning
• Solid rotor construction with a coated hat finish for corrosion resistance
• Nominal thickness of 0.472 inches (12.000 mm) with discard thickness at 0.413 inches (10.500 mm)
• Outside diameter of 12.087 inches (307.000 mm) ensuring precise fitment
• Five lug holes with a 4.5 inch (114.3 mm) bolt circle diameter
• Center hole diameter of 2.441 inches (62.000 mm) for accurate mounting
• Weight approximately 12.5 lbs (5.68 kgs) per rotor

Product Line Details: StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to provide enhanced braking performance through improved heat management and pad bite. The combination of cross-drilled holes and precision slots helps reduce brake fade by allowing gases and debris to escape, while the solid rotor design offers consistent structural integrity. The coated hat finish protects against corrosion, extending rotor life especially in varied driving conditions.

Technical Description and Fitment

This disc brake rotor is specifically designed for select Lexus models including the GS300, GS400, GS430, IS300, and SC430. The rotor’s solid construction and slotted x drilled surface type optimize braking response and pad contact. With a nominal thickness of 0.472 inches and discard thickness of 0.413 inches, these rotors maintain safety and performance standards. The rotor’s dimensions, including a 12.087 inch outside diameter and 5 lug holes on a 4.5 inch bolt circle, ensure direct compatibility with the specified Lexus vehicles.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves heat dissipation to prevent rotor warping
• Enhances brake pad cleaning for consistent stopping power
• Addresses corrosion issues with coated hat finish
• Provides reliable replacement for worn or damaged rotors on Lexus GS and IS series

Installation Notes and Tips

Ensure the rotor surface is clean and free of debris before installation. Verify the rotor thickness is within discard limits (minimum 0.413 inches) to maintain safety. Use proper torque specifications for the 5 lug nuts on the 4.5 inch bolt circle. Since bearings and ABS tone rings are not included, reuse existing components or replace as necessary. It is recommended to replace brake pads simultaneously for optimal performance.

Quality Assurance and Warranty

StopTech rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always consult product documentation or manufacturer resources for complete warranty information.