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The 034Motorsport 420mmx40mm 2-Piece Floating Front Brake Rotor Upgrade for Audi C8 RS6 & RS7 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 45.3lbs, each rotor reduces rotational weight by 2.4lbs on each corner over the factory 47.7lb rotors! While reducing weight, the rotor retains proper thermal mass in the rings to adequately capture heat, while utilizing 72 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. The rotor utilizes 72 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.
034Motorsport 2-Piece Performance Brake Rotors feature temperature-indicating paint marks on the rotor edge that provide a quick visual reference for heat exposure during aggressive street driving, autocross, or track use.
The paint changes color at specific temperature thresholds to help drivers understand operating conditions:
If the red paint turns white throughout, the rotors are consistently operating beyond their intended temperature range. This may indicate the need for lower-friction brake pads or improved cooling
| Feature / Use Case | Stock C8 RS6/RS7 Rotors | 034Motorsport 2-Piece Floating Rotors |
|---|---|---|
| Rotor Design | Semi-Floating 2-Piece Rotor | Floating 2-Piece Rotor |
| Internal Vane Design | Incorrect Directional Veins | 72 Directional Curved Vanes |
| Cooling Efficiency | Moderate | Very High |
| Rotor Material | OEM Cast Iron | CM-250 Special Alloy Rotor Rings |
| Hat Construction | Integrated Iron Hat | 6061-T6 Aerospace Aluminum Hat |
| Weight | 24.7lb OE Rotor | 22.7lb Lightweight Rotor |
| Heat Resistance | Good | Maximum |
| Warping Resistance | Moderate | Very High |
| Friction Face Design | OEM Drilled Face | J-Slotted Friction Face |
| Pad Degassing & Debris Removal | Moderate | Excellent |
| Floating Hardware | No | Yes – Floating Bobbin System |
| Replaceable Rotor Rings | No | Yes |
| Long-Term Maintenance Cost | Higher Full Rotor Replacement Cost | Lower Replacement Ring Cost |
| Street Driving | ✓✓ | ✓✓✓ |
| Spirited / Canyon Driving | ✓ | ✓✓✓ |
| Autocross / HPDE | Limited | ✓✓✓ |
| Frequent Track Use | Not Ideal | Designed For It |
| Best For | Daily Driving & Occasional Spirited Use | High-Performance Street & Track Driving |
Eurosport Performance does not have live inventory. Although we aim shipping out not stocked products within 5 business days, supply constraints, import proceedures and product availability can cause additionnal delays. Please refer to the table below for more accurate details.
In stock - We have the item in stock at our warehouse and you can expect fulfillment within 24 hours.
Usually ships within 5-7 business days - We must import this product from our supplier or the manufacturer. Standard import proceedures take between 5-7 business days and you can expect fulfillment within 8 business days.
Back ordered - This product is out of stock at our warehouse with units in transit from our supplier. Fulfillment can vary.
If you wish to have a more accurate ETA, please send us a message at info@es-performance.com and we will respond within 24-48h.
12 Months
All products sold by Eurosport Performance are warrantied against manufacturing defects according to the manufacturer's warranty policy*. Warranty does not cover abuse, misuse, damages caused from improper manipulation, normal wear and tear, improper installation, or damages resulting from racing. Warranties only apply to the original owner. If a product is found defective, the customer will receive, at the discretion of Eurosport Performance, a replacement part at no extra cost.
* Conditions may apply. Please visit our Refund Policy or contact us at info@es-performance.com

