Front Porsche/Chevy Drop (2.5") Spindle Vented Disc Brake Kit. This kit drops your front 2.5" inches and comes with all necessary components: Rotors, Calipers, Brake Pads, Wheel Bearings and Seals. Also available in Link Pin Front Ends. Kit ads 1/4" width to front end on each side. Porsche pattern is 5 on 130mm and Chevy is 5 on 4 3/4" Both patterns on the rotors as seen. Ball Joint Kits will need to upgrade Outer Tie Rod Ends to 1969 and later ends. See mor info to choose your kit