Hexagon socket oval head bolt (combi) Genuine Porsche part PAF911835

Porsche 991.2 Carrera / Carrera 2 - 2016 to 2018 with PCCB 
Porsche 991 turbo / turbo S - 2012 to 2018 with PCCB

Girodisc caliper studs are a direct replacement for the OEM caliper bolts.

A must-have item for those who track or race their cars often. The factory bolts will quickly strip out the threads in the expensive wheel uprights, from removing the calipers for maintenance. These Cup-style caliper studs will eliminate this problem and quickly pay for themselves. They also allow for quicker and easier caliper installation by guiding the calipers into position. Manufactured from aerospace quality 17-4 PH stainless steel for high strength and corrosion resistance. One kit includes 4 studs, nuts, and washers, complete for one axle. Two kits are required for the front and rear.
These Brake caliper stud kits now include the highest quality available, ARP 12-point nuts. This is a no-compromise solution. Made from high-strength stainless steel, these nuts will not corrode, have a 180,000 PSI tensile strength, and are compact in size for a better fit in the brake caliper bore.

Please Note
If you are not familiar with, or confident that you understand how to replace the caliper bolts with studs please have a certified mechanic perform the installation.

Rear 19" 
1KS - Rear disc brakes, 18", Green
1KU - Black brake callipers,
2EN - Brake callipers, Red
2EI - Rear disc brakes, 18", Black

Rear 20"
2EQ - Brake calliper painted White (PSCB)
2ES - Brake calliper painted Green (PSCB)
2EV - Rear disc brakes, PSCB, high-gloss black (EXC)

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Diagram ref no 8