Front Porsche and Chevy brake rotor. This rotor is dual drilled for Porsche 5 x 130 bolt pattern and Chevy 5 x 4.75 bolt pattern. Porsche bolt holes are 14 x 1.5 threads and Chevy bolt holes are 12 x 1.5 mm threads. This is a rotor designed for a ball joint front end. It will also work on VW link pin front ends with conversion wheel bearings.