StopTech BMW 12-13 335i/14-15 435i w/ M Sport Brakes 370mmx30mm AeroRotor Slotted Fr Rotor Pair - 81.B39.9911

StopTech AeroRotor Replacement Kits ARK are designed to replace your vehicle's original factory rotors, while retaining the factory brake calipers. Although the ARK is the same diameter and thickness as the factory rotors, it offers improved cooling, braking, and handling. The directional, floating AeroRotors allow independent expansion of the rotor and hat without "coning," thanks to elongated drive pin holes. ARK components include AeroRotor friction rings with patented internal vane design, pre-assembled to billet aluminum AeroHats with directional stand-offs that optimize cooling airflow. The patented AeroRotor vane design pushes up to 80 percent more air than factory rotors for better cooling and reduced fade on the track. The aircraft-grade aluminum hats and 2-piece AeroRotors are up to 8 pounds lighter than stock rotors, allowing faster acceleration and deceleration, and improved handling. StopTech AeroRotors are available slotted or cross-drilled. These slots or holes allow better dissipation of heat, friction material and debris, assuring that fresh pad material is in contact with the rotor every time the brakes are applied. An optional anti-corrosion, zinc finish is available for customers in cold climates, where salt and chemicals are used to melt snow and ice. The zinc coating also benefits customers who prefer no visible surface rust on the vanes and outer circumference of the rotors. StopTech AeroRotors are 100 percent made in the USA.

This Part Fits:

Year	Make	Model	Submodel
2013	BMW	328i xDrive	Base
2012-2015	BMW	335i	Base
2014-2016	BMW	335i GT xDrive	Base
2013-2015	BMW	335i xDrive	Base
2014-2015	BMW	435i	Base
2015	BMW	435i Gran Coupe	Base
2014-2015	BMW	435i xDrive	Base
2015	BMW	435i xDrive Gran Coupe	Base
2013-2015	BMW	ActiveHybrid 3	Base

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StopTech was the first to offer balanced brake upgrades for production cars and remains the worldwide leader with over 650 platform offerings to dramatically improve overall braking performance.

In 2013, StopTech earned full ISO/TS 16949:2009 Quality Management System certification for the design and manufacture of automotive brake systems and components, allowing the company to supply OEM vehicle assembly plants directly in a Tier 1 relationship.

StopTech Balanced Brake Upgrades^® provide that supercar look while delivering superior control and stopping distance equal to or better than stock brake systems. They are the ultimate brake system upgrade to support extended track lapping sessions or aggressive street driving in powerful cars.

StopTech Balanced Brake Upgrades^® are fully engineered, bolt-on systems for production cars and trucks and production-based competition vehicles, requiring little or no modification to the chassis or suspension. The more than 650 available applications include forged, billet or squeeze-forged calipers, street performance pads, caliper mounting brackets, directional patented AeroRotors^®, DOT-compliant stainless steel brake lines and all hardware required for a complete installation. StopTech brake systems are engineered, manufactured and tested utilizing the most advanced technology available today.

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