GiroDisc A1-122 350mm Front Rotors – Porsche 991.1 Carrera S / 4S / GTS

Description

GiroDisc A1-122 – Porsche 911 Carrera S/4S/GTS (991.1) 350mm

Upgrade the front braking system on your Porsche 911 Carrera S / Carrera 4S / GTS (991.1) with compatible 350mm front brakes with GiroDisc A1-122. This 350mm front brake rotor assembly 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 991.1 Carrera S
• Porsche 991.1 Carrera 4S
• Porsche 991.1 Carrera GTS with the applicable front brake package

Fitment note: The 350mm front rotor dimension is the key fitment check. This is not automatically the correct front rotor for the base Carrera, PCCB-equipped cars, or modified brake systems.

Brake System and Installation

Confirm whether the specific car requires additional hardware; no unverified conversion kit contents are claimed.

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 front brake pads compatible with the installed calipers and cast-iron friction rings. 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: A1-122
• Axle: Front
• Application: Porsche 911 Carrera S / Carrera 4S / GTS (991.1) with compatible 350mm front brakes
• Rotor diameter: 350mm
• 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.