034 Motorsport 2-Piece Floating Rear Brake Rotor Upgrade - Porsche 911 GT3 / 991.1 / 991.2

The Porsche 991 GT3 is equipped with one of the most capable factory braking systems ever fitted to a production car. Rather than reinventing what already works, 034Motorsport developed these 2-Piece Floating Rear Brake Rotors to improve the areas that matter most to enthusiasts who regularly drive their GT3 on the street and the track: durability, serviceability, and long-term value.

Designed specifically for the 991 GT3, these rotors feature a floating 2-piece design with premium CM-250 special alloy iron rotor rings, aerospace-grade aluminum hats, and a fully floating bobbin mounting system. Increased thermal mass improves heat capacity for exceptional resistance to repeated high-temperature braking, while the 72-curved-vane cooling design, J-slotted friction surfaces, and temperature-indicating paint provide the performance and feedback demanded during spirited driving and track use.

Compatible with everything from factory Porsche brake pads to the most aggressive racing compounds, these rotors are engineered to deliver consistent braking performance through countless heat cycles.

When service is required, the replaceable rotor rings allow the aluminum hats to be reused, reducing replacement costs to approximately half that of OEM Porsche rotors while maintaining factory fitment and functionality.

For drivers who use their GT3 as Porsche intended, 034Motorsport's 2-Piece Floating Rear Brake Rotors deliver exceptional durability, increased thermal capacity, and lower long-term ownership costs without compromise.

Temperature-Indicating Paint Marks:

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:

• 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

Features:

• OEM-like Lightweight Construction
• Approximately half the Cost of OEM Porsche Rotors
• Increased Thermal Mass and Heavy Duty Design over factory rotors
• Floating, 2-Piece Design
• Aerospace Grade Aluminum Hats
• CM-250 Special Alloy Rotor Rings
• J-slotted Friction Face
• OEM Fitment & Functionality
• 72 Curved Vanes Force Cooling Air through Brake Disc
• Floating Bobbins Mounting System
• Replaceable Rotor Rings
• Temperature Indicating Paint on Rotor Edges
• Lower Long-Term Maintenance Cost

What’s Included:

• 380x30mm Left Rotor
• 380x30mm Right Rotor
• Installation and Break-in Instruction Sheets

OE Part Interchange:

• 991 352 407 80 Left)
• 991 352 407 82 (Left)
• 991 352 408 80 (Right)
• 991 352 408 82 (Right)