Stoptech 128.47021L Disc Brake Rotor - Front Left

StopTech Sport Cross-Drilled Disc Brake Rotors Overview

The StopTech Sport Cross-Drilled Disc Brake Rotors (Part Number 128.47021L) are engineered for enhanced braking performance on select Scion, Subaru, and Toyota models. Designed with precision vented construction and cross-drilled surface, these rotors provide reliable heat dissipation and consistent stopping power.

• Cross-drilled surface for improved heat dissipation and reduced brake fade
• Vented rotor design to maintain optimal operating temperatures
• Coated hat finish to resist corrosion and extend rotor life
• Floating disc mounting for better rotor alignment and performance
• Compatible with 5-lug wheel setups featuring a 100 mm bolt circle diameter

Detailed Product Features and Specifications

The StopTech Sport Cross-Drilled Disc Brake Rotors feature a nominal thickness of 0.945 inches (24.000 mm) and a discard thickness of 0.866 inches (22.000 mm), ensuring durability and serviceability. The rotors have an overall height of 2.232 inches (56.700 mm) and an outside diameter of 11.555 inches (293.500 mm), designed to fit specific vehicle brake assemblies. The vented rotor design with straight vanes promotes efficient airflow, reducing heat buildup during aggressive braking. The coated hat finish provides corrosion resistance, maintaining rotor integrity over time. This rotor does not include ABS tone rings or bearings and is designed for floating disc mounting, which helps reduce stress and improve braking consistency.

StopTech Sport Cross-Drilled Disc Brake Rotors Product Line

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on delivering performance-oriented rotors with enhanced cooling capabilities. The cross-drilled surface pattern improves water and gas evacuation from the rotor surface, which is beneficial for spirited driving and track use. This product line balances durability with improved braking response, making it suitable for drivers of Scion 86, Subaru BRZ, Toyota GR86, and other compatible models seeking reliable brake upgrades.

Compatible Vehicles and Applications

• Scion 86
• Subaru BRZ, Baja, Crosstrek, Forester, Impreza, Legacy, Outback, WRX, XV Crosstrek
• Toyota FR-S, GR86

These rotors are designed specifically for vehicles with a 5-lug wheel pattern and a 100 mm bolt circle diameter, ensuring proper fitment and performance.

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during aggressive driving
• Corrosion and rust on rotor hats reducing rotor lifespan
• Poor brake pedal feel due to uneven rotor surface temperatures
• Reduced braking efficiency from trapped gases and debris on rotor surface
• Warping or cracking from thermal stress during high-performance use

Installation Notes and Tips

• Ensure rotor discard thickness of 0.866 inches (22.000 mm) is not exceeded before replacement
• Verify compatibility with vehicle’s 5-lug, 100 mm bolt circle wheel hubs
• Use proper torque specifications on mounting bolts to avoid rotor warping
• Inspect brake pads and calipers during installation for optimal system performance
• Clean rotor surface with brake cleaner before installation to remove any protective coatings

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The coated finish and vented design contribute to long-term durability and consistent braking 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 authorized distributors for exact warranty terms.