Stoptech 127.33137L 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 127.33137L) are engineered for enhanced braking performance on select Audi and Porsche models. Designed to improve heat dissipation and reduce brake fade, these rotors provide reliable stopping power for vehicles such as the Audi A4, A5, A6, and Porsche Macan.

• Cross-drilled and slotted surface for improved heat dissipation and debris removal
• Vented rotor design with pillar-style vanes to optimize cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better rotor alignment and reduced warping
• Compatible with multiple Audi and Porsche models including Quattro and Sportback variants

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

This rotor is part of the StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line, which focuses on delivering enhanced braking performance through advanced rotor surface technology. The combination of cross-drilled holes and precision slots helps maintain consistent brake pad contact, reduces gas buildup, and improves water evacuation. These rotors are vented with pillar-style vanes to maximize airflow and cooling, making them suitable for both street and light track use on compatible Audi and Porsche vehicles.

Technical Specifications and Features

The 127.33137L rotor features a nominal thickness of 0.858 inches (21.8 mm) and a discard thickness of 0.787 inches (20 mm), ensuring a balance between durability and performance. The rotor has an overall height of 1.425 inches (36.2 mm) and an outside diameter of 12.992 inches (330 mm). It includes a 5-lug pattern with a mounting bolt hole circle diameter of 4.409 inches (112 mm) and a center hole diameter of 2.677 inches (68 mm). The rotor weighs approximately 17.25 lbs (7.84 kg) and features a floating disc mounting system to reduce stress and improve longevity.

Compatible Vehicles

This disc brake rotor is compatible with a range of Audi and Porsche models, including:

• Audi A4, A4 allroad, A4 Quattro
• Audi A5, A5 Quattro, A5 Sportback
• Audi A6, A6 allroad, A6 Quattro
• Audi A7, A7 Quattro, A7 Sportback
• Audi A8 Quattro
• Porsche Macan, Q5, Q7, S4, S5, S5 Sportback, S7, SQ5

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during aggressive driving
• Uneven brake pad wear due to poor rotor surface design
• Corrosion and rust on rotor hats reducing lifespan
• Brake noise and vibration from warped or overheated rotors
• Reduced braking efficiency in wet conditions due to water retention

Installation Notes and Tips

• Ensure rotor discard thickness is not exceeded before installation
• Use proper torque specifications for mounting bolts to avoid rotor warping
• Check compatibility with 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 and pads

Quality Assurance and Warranty

StopTech Sport Cross-Drilled & Slotted 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.