Stoptech 127.44141R 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 127.44141R) are engineered for Lexus GS300, GS350, GS430, GS450h, GS460, IS250, and IS350 models. Designed to enhance braking performance, these rotors feature a vented, slotted, and cross-drilled surface for improved heat dissipation and consistent stopping power.

• Cross-drilled and slotted surface for better heat and gas dissipation
• Vented rotor design to reduce brake fade
• Coated hat finish for corrosion resistance
• Floating disc mounting for improved rotor alignment
• Compatible with Lexus GS and IS series models
• Overall diameter: 12.205 inches (310 mm)
• Nominal thickness: 0.701 inches (17.8 mm)
• Mounting bolt pattern: 5 lug holes, 4.5 inch (114.3 mm) bolt circle diameter

Detailed Product Description

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors are precision-engineered vented rotors designed to meet the braking demands of Lexus GS and IS series vehicles. The cross-drilled holes and slots on the rotor surface help to evacuate heat, brake dust, and gases generated during braking, which improves pad bite and reduces the risk of brake fade under heavy use. The vented design with straight vanes enhances airflow through the rotor, further aiding in temperature control. The coated hat finish protects against corrosion, extending rotor life and maintaining appearance. These rotors feature a floating disc mounting system that allows slight movement between the rotor and hat, helping to reduce stress and improve overall braking consistency. With a 5-lug, 4.5-inch bolt circle pattern and a center hole diameter of 2.441 inches (62 mm), these rotors are designed for direct fitment on Lexus GS300, GS350, GS430, GS450h, GS460, IS250, and IS350 models.

About the StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Line

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line focuses on delivering enhanced braking performance through advanced rotor surface designs. By combining cross-drilled holes with precision slots, this product line improves heat dissipation and pad cleaning, which is critical for maintaining consistent braking under demanding conditions. The vented rotor construction further supports thermal management, making these rotors suitable for both spirited street driving and moderate track use. This part number 127.44141R is a representative example of the line’s engineering tailored specifically for Lexus GS and IS series vehicles.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves brake pad bite and responsiveness
• Minimizes brake dust buildup on rotor surface
• Prevents rotor warping caused by excessive heat
• Enhances overall braking consistency and safety

Installation Notes and Tips

Ensure the vehicle is securely lifted and supported before removing the existing rotors. Clean the hub surface thoroughly to prevent rotor runout. Verify the rotor thickness and discard thickness limits (nominal thickness 0.701 inches, discard thickness 0.650 inches) before installation. Use proper torque specifications for the 5 lug nuts on the 4.5-inch bolt circle. Since bearings are not included, inspect wheel bearings during installation. The floating disc mounting requires correct alignment to avoid noise or uneven wear.

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 the product documentation or manufacturer for exact warranty terms.