034 Motorsport - 1-Piece Rear Brake Rotor Upgrade Kit, Volkswagen & Audi MQB/PQ35 - 034-301-2021

034Motorsport 1-Piece Rotors deliver a meaningful braking upgrade for Audi and Volkswagen platforms. Designed as a direct replacement for factory rotors, they combine advanced high-strength alloy, and proven track-inspired features at a price point typically reserved for basic blank rotors.

High Strength CM-250 Alloy:

Factory rotors are typically cast from relatively soft iron, which wears quickly and warps under high pressure and high heat. 034Motorsport 1-Piece Rotors use a Heat-Treated CM-250 special alloy formulated specifically for performance driving. This material is more resistant to heat cycling, less prone to warping, and better suited for repeated high-temperature braking than OEM rotors.

J-Slot Friction Face:

The J-slot slotted friction surface is designed to do more than just look aggressive. J-slots help clear debris from the pad surface, allow pad off-gassing under high temperatures, and distribute heat more evenly across the rotor face, reducing the likelihood of hot spots. This results in more consistent braking performance compared to traditional straight slots or drilled rotors, which can concentrate heat and increase the risk of cracking.

Street Friendly, Track Capable:

These rotors are optimized for daily driving, spirited canyon runs, autocross, and entry-level track days. They are fully compatible with stock calipers and can be used with factory pads or upgraded performance pads. For drivers engaging in more aggressive back-road use or extended track sessions, 034Motorsport 2-Piece rotors remain the ideal solution and are recommended for the highest thermal demands.

Built for Year-Round Use:

Each rotor is finished with a Geomet anti-corrosion coating to protect against rust and corrosion, making them suitable for all weather conditions. Temperature-indicating paint marks on the rotor edge provide a visual reference for heat exposure during aggressive driving or track use.

Temperature-Indicating Paint Marks:

034Motorsport 1-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:

• Green → White at 478°C (892°F)
• Orange → Yellow at 571°C (1060°F)
• Red → White at 640°C (1184°F)

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.

Performance That Makes Sense:

034Motorsport 1-Piece Rotors are priced competitively with basic blank replacement rotors, while delivering meaningful performance improvements in cooling, durability, and braking consistency. This makes them one of the best value brake upgrades available for Audi and VW owners.

Features:

• 272mmx10mm Solid Rotor
• OEM Fitment & Functionality
• CM-250 Special Alloy Designed Specifically To Reduce Warping from Hard Street Use
• J-Slot Slotted Friction Face
• Temperature Indicating Paint Marks on Rotor Edge:
  • Green changes to white at 478° C (892° F)
  • Orange changes to yellow at 571° C (1060° F)
  • Red changes to white at 640° C (1184° F)
    • If the Red paint turns white throughout, the rotors are running too hot.
• Heat Treated
• Geomet Anti-Corrosion Coating

What's Included:

• 034Motorsport 1-Piece Rear Rotor Pair

Part Number Interchange:

• 1K0 615 601 AA

Fitment:

* NOTE: Post 11/2/2012 production date only.