Stoptech 127.44141L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.44141L) are engineered for Lexus GS and IS series models, including GS300, GS350, GS430, GS450h, GS460, IS250, and IS350. These rotors provide enhanced braking performance through advanced vented design and precision machining.

• Cross-drilled and slotted surface for improved heat dissipation and brake pad bite
• Vented rotor design with straight vane style for efficient cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better thermal expansion management
• Compatible with Lexus GS and IS models with 5-lug bolt pattern and 310mm diameter

Detailed Product Features and Specifications

This disc brake rotor features a nominal thickness of 17.8 mm (0.701 inches) and a discard thickness of 16.5 mm (0.650 inches), ensuring reliable wear limits for safe operation. The rotor’s overall height measures 67.5 mm (2.657 inches), with an outside diameter of 310 mm (12.205 inches). Designed with a 5-stud lug hole pattern spaced on a 114.3 mm (4.5 inch) bolt circle diameter, it fits specific Lexus GS and IS models precisely. The rotor includes a floating disc mounting system to accommodate thermal expansion and reduce stress, while the vented design with straight vanes promotes consistent cooling during heavy braking. The hat section is coated to protect against rust and corrosion, maintaining rotor integrity over time. This rotor does not include ABS tone rings or bearings.

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to enhance braking performance by combining cross-drilled holes and precision slots. This design improves pad bite and helps evacuate gases, dust, and water from the rotor surface. The vented and coated construction supports heat dissipation and corrosion resistance, making it suitable for both street and spirited driving conditions. This product line focuses on delivering consistent braking performance and durability for performance-oriented vehicles like the Lexus GS and IS series.

Applications and Problem Solving

• Reduces brake fade caused by excessive heat buildup during aggressive driving
• Improves wet weather braking by channeling water away from the rotor surface
• Minimizes brake pad glazing and uneven wear through enhanced surface design
• Prevents corrosion on the rotor hat area with a protective coating
• Maintains consistent braking performance under repeated heavy use

Installation Notes and Tips

• Ensure compatibility with Lexus GS300, GS350, GS430, GS450h, GS460, IS250, and IS350 models before installation
• Check rotor thickness and discard limits during installation to confirm safe use
• Use proper torque specifications for the 5-lug mounting bolts on the 114.3 mm bolt circle
• Inspect brake pads and calipers for wear or damage when replacing rotors
• Follow manufacturer guidelines for bedding-in new rotors and pads to optimize performance

Quality Assurance and Warranty

StopTech disc brake rotors are manufactured to meet strict quality standards, ensuring durability and consistent performance. The rotors undergo precision machining and coating processes to maintain dimensional accuracy and corrosion resistance. 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 StopTech directly for exact warranty terms.