Stoptech 128.33137L Disc Brake Rotor - Rear Left

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.33137L is engineered for Audi and Porsche vehicles, including models like the Audi A4, A5, A6, A7, Q5, and Porsche Macan. Designed to enhance braking performance, this vented rotor features a cross-drilled surface for improved heat dissipation and consistent stopping power.

• Cross-drilled surface for enhanced cooling and reduced brake fade
• Vented rotor design with pillar-style vanes for efficient heat dissipation
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for improved rotor alignment and performance
• Compatible with multiple Audi and Porsche models including A4 Quattro, S5 Sportback, Q7, and Macan
• Precision engineered with a 330 mm outside diameter and 21.8 mm nominal thickness

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line is designed to provide reliable braking performance under demanding conditions. Featuring cross-drilled surfaces and vented construction, these rotors help maintain optimal brake temperatures and reduce the risk of brake fade during spirited driving or heavy use. The coated hat finish offers additional protection against rust, making them suitable for both daily driving and performance applications. The 128.33137L rotor is part of this line, tailored specifically for select Audi and Porsche models.

Technical Specifications and Features

This disc brake rotor has a nominal thickness of 0.858 inches (21.8 mm) and a discard thickness of 0.787 inches (20 mm), ensuring a long service life before replacement is necessary. The rotor measures 12.992 inches (330 mm) in outside diameter with an overall height of 1.425 inches (36.2 mm). It features a vented design with pillar-style vanes to optimize airflow and cooling. The rotor mounts using a floating disc system and includes five stud/lug holes with a 4.409 inch (112 mm) bolt circle diameter. The hat is coated to resist corrosion and has a center hole diameter of 2.677 inches (68 mm). This rotor weighs approximately 17.25 lbs (7.84 kg).

Applications and Problem Solving

• Reduces brake fade during aggressive driving or towing
• Improves heat dissipation to prevent rotor warping
• Enhances braking consistency in wet or high-temperature conditions
• Resists corrosion for longer rotor lifespan
• Compatible with ABS systems without tone ring interference

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Use proper torque specifications for mounting bolts on the 5-lug pattern
• Check compatibility with vehicle ABS systems as this rotor does not include an ABS tone ring
• Inspect brake pads for wear and replace if necessary when installing new rotors
• Follow manufacturer guidelines for bedding-in new rotors to optimize performance

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. Each rotor undergoes rigorous quality control to ensure durability and performance. While specific warranty details are not provided here, StopTech products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.