Stoptech 127.44090L Disc Brake Rotor - Rear Left

Overview of StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.44090L) are engineered for Lexus GS300, GS400, GS430, IS300, and SC430 models. Designed to enhance braking performance, these rotors feature a solid construction with a coated hat finish for durability and corrosion resistance.

• Cross-drilled and slotted surface for improved heat dissipation and brake pad cleaning
• Solid rotor design with a coated hat finish to resist corrosion
• 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) for 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 cross-drilled holes and slots help reduce brake fade by allowing gases and debris to escape, while the solid rotor construction ensures consistent braking feel. This product line is suitable for drivers seeking reliable stopping power and rotor longevity on Lexus GS and IS series vehicles.

Technical Specifications and Compatibility

This disc brake rotor is specifically compatible with Lexus GS300, GS400, GS430, IS300, and SC430 models. It features a solid rotor type with a slotted and drilled surface to optimize braking efficiency. The rotor’s overall height measures 2.492 inches (63.3 mm), and it includes five stud/lug holes with a diameter of 0.571 inches (14.5 mm). The rotor does not include ABS tone rings or bearings, so these components must be sourced separately if required.

Common Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves brake pad cleaning to maintain consistent friction
• Enhances heat dissipation to prevent rotor warping
• Addresses corrosion issues with coated hat finish
• Restores braking performance on Lexus GS and IS models with worn or damaged rotors

Installation Notes and Tips

• Ensure rotor discard thickness of 0.413 inches (10.5 mm) is not exceeded during replacement
• Verify compatibility with vehicle ABS system as this rotor does not include an ABS tone ring
• Use proper torque specifications for the 5 lug nuts on the 4.5 inch bolt circle diameter
• Inspect brake pads and replace if worn to maximize rotor performance
• Clean mounting surfaces before installation to prevent uneven rotor wear

Quality Assurance and Warranty

StopTech disc brake 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. It is recommended to consult the product documentation or manufacturer for exact warranty terms.