Empi 22-2985 Bolt-On Front Disc Brake Kit. Disc Brake Rotors With 5 X 130mm Porsche & 5 X 4-3/4" Chevy Lug Bolt Pattern (Porsche 14mm Threads / Chevy 12mm Threads). Proper Length Of Each Line In Relation To Wheel Travel And Steering Angle Is Critical To Avoid Brake Failure.