034 Motorsport 2 Piece Floating Rear Brake Discs / Rotors Upgrade Kit (345mmx24mm) for BMW M340i (G20)

The 034Motorsport 345mmx24mm 2-Piece Floating Rear Brake Rotor Upgrade Kit for the G20 BMW M340i & A90/A91 Toyota Supra is a complete replacement brake rotor kit, designed to work flawlessly with the factory rear calipers found on the G20 BMW M340i & A90/A91 Toyota Supra.Weighing in at approximately 16.9 lbs, our lightweight design retains proper thermal mass in the rings to adequately capture heat, while utilizing 36 enhanced directionally curved vanes to forcefully flow cool air through the rotor to dissipate heat.The central hat portion of the 034Motorsport rotor is made of 6061-T6 aircraft specification aluminum. The disc is constructed out of a proprietary metal alloy that can withstand immense braking temperatures while holding form allowing hard street use and long days at the track, allowing you to drive versus working on the car. These rotors improve thermal capacity by utilizing 36 directionally curved cooling vanes to forcefully flow cool air through the rotor and are profiled specifically to improve heat dissipation compared to the OE rotor vane design.The face of the rotor utilizes J-Slot slots which increase braking surface area over drilled rotors as well as clean the pad and surface of contaminants and allow hot pad outgassing, all while reducing overall braking noise compared to a traditional slotted rotor. This J-Slot design also improves upon the OEM drilled rotors, as drilled rotors are prone to cracking after repeated abuse.With its true 2-Piece design, the rotor and hat have a floating mount system that utilizes high-strength alloy steel bobbins. The pins take the load from braking actions while maintaining the axial and radial float between the hat and disc, allowing for safe expansion and contraction from heat. This 2-Piece design also makes repair costs in the future significantly less overtime, as only the rotor rings would need to be replaced.034Motorsport 2-Piece Rotors have been thoroughly tested in high-intensity motorsport events, proven to significantly improve braking and thermal headroom and for extreme performance street and track driving, making them the perfect replacement rotor for your G20 BMW M340i or A90/A91 Toyota Supra. Features: Lightweight Construction (16.9lb 034Motorsport Rotor vs. 18.6lb OE BMW Rotor) Floating, 2-Piece Design Aerospace Grade Aluminum Hats CM-250 Special Alloy Rotor Rings J-slotted Friction Face OEM Fitment & Functionality 36 Curved Vanes Force Cooling Air through Brake Disc Floating Bobbins Mounting System Replaceable Rotor Rings Lower Long-term Maintenance Cost