Stoptech 127.33138L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors (Part Number 127.33138L) are engineered for Audi and Porsche vehicles, including models like the Audi A5, A6, A6 Quattro, A7 Quattro, S4, S5, and Porsche Macan and Q5. These rotors provide enhanced braking performance through a vented design combined with cross-drilled and slotted surfaces.

• Cross-drilled and slotted surface for improved heat dissipation and brake pad cleaning
• Vented rotor design with pillar-style vanes for efficient cooling
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better thermal expansion management
• Precision fit with 5 lug holes and 112 mm bolt circle diameter

Detailed Product Features and Specifications

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors feature a nominal thickness of 30.000 mm (1.181 inches) and a discard thickness of 28.000 mm (1.102 inches), ensuring a long service life before replacement is necessary. The rotors have an outside diameter of 345 mm (13.583 inches) and an overall height of 52.100 mm (2.051 inches). The vented design incorporates pillar-style vanes that promote airflow to reduce heat buildup during aggressive braking. The rotor hat is coated to protect against rust and corrosion, maintaining structural integrity over time. This rotor does not include ABS tone rings or bearings, and it mounts using a floating disc system to accommodate thermal expansion and reduce warping risks.

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

The StopTech Sport Cross-Drilled & Slotted Disc Brake Rotors line is designed to offer enhanced braking performance for sport and performance vehicles. The combination of cross-drilled holes and slots improves pad bite and helps evacuate gases, dust, and water from the rotor surface. This product line focuses on maintaining consistent braking under demanding conditions, making it suitable for both street and light track use. The rotors are engineered to meet the specific fitment requirements of Audi and Porsche models, ensuring precise installation and reliable operation.

Common Applications and Problem Solving

• Reduces brake fade caused by excessive heat buildup
• Improves wet weather braking by channeling water away from the rotor surface
• Minimizes brake pad glazing and deposits for consistent friction
• Helps prevent rotor warping through vented design and floating mount
• Extends rotor lifespan with corrosion-resistant coated hat finish

Installation Notes and Tips

• Compatible with Audi A5, A6, A6 Quattro, A7 Quattro, S4, S5 and Porsche Macan, Q5 models
• Ensure rotor discard thickness is checked regularly to maintain safety
• Use proper torque specifications for the 5 lug bolts on the 112 mm bolt circle
• Inspect brake pads and calipers during installation for optimal performance
• Floating disc mounting requires correct alignment to avoid noise or uneven wear

Quality Assurance and Warranty

StopTech rotors are manufactured to meet strict quality standards with precision machining and durable coatings. While specific warranty details are not provided here, StopTech products typically come with manufacturer-backed warranties covering defects in materials and workmanship. It is recommended to consult the product documentation or manufacturer for exact warranty terms.