GiroDisc A2-035 325mm Rear Rotors – Porsche 981 Boxster / Cayman Base

Description

GiroDisc A2-035 – Porsche Cayman/Boxster (981) Base 325mm

Upgrade the rear braking system on your Porsche 981 Boxster / Cayman base models with compatible 325mm rear brakes with GiroDisc A2-035. This 325mm rear rotor replacement uses serviceable slotted cast-iron friction rings and lightweight aluminum center hats in a two-piece floating design intended for demanding performance driving.

Vehicle Applications and Fitment

• Porsche 981 Boxster base
• Porsche 981 Cayman base
• Compatible 325mm rear brake configuration

Fitment note: This is the matching rear application to the 981 base-model GiroDisc front rotor family, subject to confirming both axle configurations on the car.

Brake System and Installation

Verify whether any vehicle-specific installation hardware is required.

Two-Piece Floating Construction

GiroDisc combines slotted cast-iron friction rings with aluminum mounting hats and floating drive hardware. This arrangement accommodates heat-related expansion of the friction ring relative to the hat during repeated braking. The system is serviceable: worn friction rings can be replaced separately when compatible replacement rings are available and the hats remain within service limits.

Cooling and Slotted Friction Surface

Internally ventilated friction rings promote airflow through the rotor under rotation. The slotted contact surface is designed to work with suitable performance brake pads during repeated braking events. Proper ducting, pad selection and brake-fluid maintenance remain important for track use.

Brake Pads and Fluid

Use rear pads matching the 981 base-model caliper and the cast-iron rotor. For track use, choose a brake fluid with a suitable boiling-point specification and follow the vehicle and pad manufacturer’s bedding and service guidance.

Specifications

• Manufacturer: GiroDisc
• Manufacturer part number: A2-035
• Axle: Rear
• Application: Porsche 981 Boxster / Cayman base models with compatible 325mm rear brakes
• Rotor diameter: 325mm
• Construction: Two-piece floating
• Friction surface: Slotted cast iron
• Center hats: Aluminum
• Ventilation: Internally ventilated
• Quantity: Left and right pair

Before Ordering

Confirm the original brake package, rotor dimensions, caliper configuration and pad shape. PCCB-equipped and previously modified vehicles may require different components. Contact Demon Speed Motorsports for help confirming fitment. Sold as a left and right rotor pair.