034Motorsport 2-Piece Floating Front Brake Rotor Upgrade

The 034Motorsport 348mm x 36mm 2-Piece Floating Front Brake Rotor Upgrade is engineered for precision and performance, specifically designed for the BMW M340i G20 and Toyota A90/A91 GR Supra. This complete replacement rotor integrates seamlessly with factory front calipers, enhancing braking performance across various driving conditions, including street, track, and HDPE events.

Specifications

Each rotor weighs approximately 25.0 lbs, providing a weight reduction of 3.1 lbs per corner compared to the factory rotors, which weigh 28.10 lbs. This reduction in rotational mass contributes to improved acceleration and handling without sacrificing thermal performance.

Construction and Design

The rotor features a central hat made from 6061-T6 aircraft-grade aluminum, ensuring lightweight durability. The disc is crafted from a proprietary metal alloy designed to withstand high temperatures while maintaining structural integrity. With 48 directionally curved vanes, this rotor effectively channels cool air through the disc, promoting efficient heat dissipation.

Friction Surface

The rotor's face incorporates J-Slot technology, which not only cleans the brake pad surface but also allows for effective outgassing of hot brake pads. This design minimizes noise compared to traditional slotted rotors, ensuring a quieter and more efficient braking experience.

Floating Mount System

Utilizing a floating mount system with high-strength alloy steel bobbins, the rotor maintains axial and radial float between the hat and disc. This design accommodates thermal expansion and contraction during braking, enhancing safety and performance.

Key Features

• Lightweight Construction (25.0 lbs vs. 28.0 lbs OE)
• Floating, 2-Piece Design for Enhanced Performance
• Aerospace Grade Aluminum Hats for Durability
• CM-250 Special Alloy Rotor Rings for High-Temperature Resistance
• J-Slotted Friction Face for Reduced Noise and Improved Performance
• OEM Fitment and Functionality for Easy Installation
• 48 Curved Vanes for Optimal Cooling
• Replaceable Rotor Rings for Lower Long-term Maintenance Costs

OE Part Interchange

• 34 10 8 858 705 (Left)
• 34 10 8 858 706 (Right)

Included Components

• 348mm x 36mm Left Rotor
• 348mm x 36mm Right Rotor
• Installation and Break-in Instruction Sheet

Fitment

• BMW M340i G20 B58 3.0L (2019+)
• BMW M340i xDrive G20 B58 3.0L (2019+)
• Toyota GR Supra A90/A91 B58 3.0L (2020+)