TAG Motorsports is pleased to offer the GiroDisc Porsche 380mm Rear 2-Piece Slotted Rotors (part number A2-155) for the Porsche 911 / Boxster / Cayman.

These GiroDisc 2-piece rotors are a direct replacement for the 380mm rear rotors on a variety of Porsche applications.

The rotor rings are machined from a proprietary casting made of high-carbon iron formulated to GiroDisc's specifications. This superior metallurgy results in a rotor that better withstands hard use, and the curved vanes act as a centrifugal pump pulling air in through the hub to cool the discs. The 2-piece design has a reusable hat which can be installed onto new rings when they need to be replaced.

All major components including the hats, rotor rings, and drive pins are manufactured in-house at our facility in Bellingham, WA from domestically-sourced materials. The hat is made from 6061-T6 aluminum and coated in a black anodize finish. The drive pins are made from a high-strength steel alloy and cadmium-plated for corrosion resistance. All rotors are assembled with spring clips and spring washers for race-ready float while also being street-friendly with no noise from loose hardware.

Outer diameter: 380mm
Thickness: 32mm
Minimum thickness: 30mm
Weight: 23.1 lbs per rotor assembly
Vane count: 72 curved vanes
Replacement rings: D2-146

We recommend replacing the rings when they reach minimum thickness or if a crack forms leading to the edge of the ring.

GiroDisc part number: A2-155. Sold and priced per pair (one axle).

Fits: Porsche 911 (991) 991 Turbo, Turbo S (Without PCCB); Porsche 911 (992) 992 Turbo (Without PCCB); Porsche 911 (992) 992.1 GTS (Without PCCB (GT3 Front Pad)); Porsche 911 (992) 992.2 S/4S/GTS (Without PCCB (GT3 Front Pad)); Porsche Cayman/Boxster 718 Boxster Spyder (Without PCCB); Porsche Cayman/Boxster Cayman GT4 (Without PCCB).