034 Motorsport 2 Piece Floating Front Brake Discs / Rotors Upgrade Kit (348mmx36mm) for BMW M340i (G20)

The 034Motorsport 348mmx36mm 2-Piece Floating Front Brake Rotor Upgrade for BMW G20 M340i and Toyota A90/91 GR Supra is a complete replacement brake rotor, designed to work flawlessly with the factory front calipers. Upgrading your front rotors will increase overall braking performance in street, track, and HDPE driving conditions, as they keep your brakes cool and strong all day long!Weighing in at approximately 25.0lbs, each rotor reduces rotational weight by 3.1lbs on each corner over the factory 28.10lb rotors! While reducing weight, the rotor retains proper thermal mass in the rings to adequately capture, and 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. The rotor utilizes 48 directionally curved vanes to forcefully flow cool air through the rotor to dissipate heat.The face of the rotor utilizes J-Slot slots to clean the pad and surface of contaminants and allows hot pad outgassing, all while reducing overall braking noise compared to a traditional slotted rotor.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. Features: Lightweight Construction (25.0lb 034Motorsport Rotor vs. 28.0lb OE BMW Rotor) Floating, 2-Piece Design Aerospace Grade Aluminum Hats CM-250 Special Alloy Rotor Rings J-slotted Friction Face OEM Fitment & Functionality 48 Curved Vanes Force Cooling Air through Brake Disc Floating Bobbins Mounting System Replaceable Rotor Rings Lower Long-term Maintenance Cost OE Part Interchange: 34 10 8 858 705 (Left) 34 10 8 858 706 (Right) What’s Included: 348×36 Left Rotor 348×36 Right Rotor Installation and Break-in Instruction Sheet