034 Motorsport 2-Piece Floating Rear Brake Rotor Upgrade Kit for G8X BMW M2/M3/M4

The 034Motorsport 370mmx24mm 2-Piece Floating Rear Brake Rotor Upgrade Kit for the BMW G8x M2/M3/M4 is a complete replacement brake rotor kit, designed to work flawlessly with the factory rear calipers found on the BMW G8x M2/M3/M4. This is a true high performance and racing quality rotor that won’t let you down when you need hard braking the most! Weighing in at approximately 18.3lbs, our lightweight design retains proper thermal mass in the rings to adequately capture heat, while utilizing 36 directionally curved vanes to forcefully flow cool air through the rotor to dissipate heat.

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 BMW G8X.

NVH Levels: None-Low

NVH is the measurement of how much noise, vibration, & harshness gets transmitted into the cabin of your vehicle. The 034Motorsport 2-Piece Brake Rotors transfer none to low amounts of noise to the cabin based on user feedback. This NVH is relative to the brake pad installed with the brake rotor. Different brake pads will have different resonances when passing over a rotor with slots, which can sometimes make a slight whirring noise. The sounds from these rotors are the direct result of the performance improvements they make to the braking. The J-slots release gas from under the brake pad, and the high-density directional aero veining in the rotors move substantial air, all resulting in more sounds of air moving. The installation of other suspension components can also affect the NVH transferred. NVH is subjective, so some users may find NVH to be increased or decreased from our rating. If you are experiencing higher than quoted NVH with this product, please email techsupport@034motorsport.com for further assistance.

Product Description:

The 034Motorsport 370mmx24mm 2-Piece Floating Rear Brake Rotor Upgrade Kit for the BMW G8x BMW M2/M3/M4 is a complete replacement brake rotor kit, designed to work flawlessly with the factory rear calipers found on the BMW G8x M2/M3/M4.

Weighing in at approximately 18.3 lbs, our lightweight design retains proper thermal mass in the rings to adequately capture heat, while utilizing 36 directionally curved vanes to forcefully flow cool air through the rotor to dissipate heat.

Advantages of J-Slot over Drilled Rotors:

Typically, OEM rotors that are drilled are first cast and then drilled, which creates additional stress points that weaken structural integrity, making them more prone to cracking as they go through heat cycles and wear over time. To address these concerns, 034Motorsport engineers opted for a J-Slot design over a drilled rotor, which effectively clears contaminants from the pad and rotor surfaces while allowing for hot pad outgassing without reducing the structural integrity of the rotor.

True 2-Piece Design:

While BMW employs a 2-piece rotor design utilizing pins in which the rotor ring can slightly expand and contract compared to the rotor hat, the rotor ring is not fully floating. Additionally, the outer friction surface cannot be replaced individually, adding unnecessary cost to brake services.

034Morsport employs a high-strength steel bobbin-style floating 2-piece rotor design versus the BMW OEM pin-style design. 034Motorsport’s 2-Piece Rotors allow the rotor ring to “float” on the central hat while the rotor ring expands and contracts, preventing the likelihood of cracks and rotor warpages in high-performance driving scenarios.

The central hat on 034Motorsport 2-Piece rotors is crafted from 6061-T6 aircraft-grade aluminum, while the brake disc is made from a proprietary alloy that is able to withstand extreme braking temperatures while maintaining structural integrity. The high carbon content of the brake disc also allows for the rotor to take a lot of heat and dissipate it quickly. 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.

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 BMW G8X.

Features:

• Lightweight Construction (18.3lb 034Motorsport Rotor), the Same Weight as OEM, but with Improved Metallurgy and Thermal Capacity, despite Lightweight Construction to Match OEM Rotor Lightweight Design Elements
• 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

**Please Note: Type III hard anodizing of aluminum is considered as a functional surface coating process. While we always aim for color consistency, color variations may exist from batch to batch due to the nature and variables in the anodizing process.