Paragon 2-Piece Rear Rotors Pair – Porsche 981 / 718 Cayman GT4 (Iron Conversion) – 390 x 32mm

Overview
Paragon 2-Piece Rear Rotors are designed to deliver superior braking and cooling efficiency for high-performance track and race applications. Developed as a direct iron conversion for factory ceramic composite rotors (PCCB), these rotors provide improved durability under extreme conditions while lowering long-term maintenance costs. Directional ventilation vanes maximise airflow through the rotor, helping to reduce temperatures and increase resistance to thermal cracking during repeated heavy braking.

Key Features

• 390 x 32mm slotted 2-piece rear rotors with directional ventilation vanes
• Iron conversion from factory ceramic PCCB rotors for superior track durability
• CM-250 high-carbon alloy cast iron rings, heat-treated and CBN surface machined
• Floating 2-piece construction with D-Bobbin (Short) 12-bolt mounting system
• Maintains OEM brake bias and ABS compatibility
• Up to 30% cooler operation compared to OEM rotors
• Reduced unsprung mass improves handling responsiveness
• Slotted design enhances consistency and wet-weather braking performance
• Direct bolt-on fit, no modifications required

Construction
Rotor rings are manufactured from CM-250 high-carbon alloy cast iron for optimal bite and thermal stability. Each rotor is heat-treated to relieve internal stresses and CBN-machined to ensure precise pad bedding. Run-out is held within ≤0.03mm and balance variation within 2 grams for minimal vibration. Hats are CNC-machined from aerospace-grade 6061-T6 aluminium and Mil-Spec Type III hard anodised for durability under extreme heat and resistance to corrosion. Clear hard anodised hats withstand the highest track temperatures, while black dyed hardcoat hats are more suited to mixed street/track use (may discolour above 260°C).

Vehicle Compatibility

• Porsche 981 Cayman GT4 (2015–2016) – with factory ceramic brakes (PCCB)
• Porsche 718 Cayman GT4 (2020–present) – with factory ceramic brakes (PCCB)

OEM Cross Reference
Direct replacement for Porsche OEM part numbers: 992-615-601-L / 992-615-602-Q

Kit Contents

• 1 x Pair of Paragon Performance 390 x 32mm 2-piece rotor assemblies
• Black hard coat/hard anodised 6061-T6 aluminium hats
• Stainless steel bobbins and anti-rattle clips
• Installation manual

Part Numbers

• P2R.221.390.320.23370.09.01.01.R – Black Hard Anodised Hat
• P2R.221.390.320.23370.09.01.02.R – Clear Hard Anodised Hat