Product Description This front kit offers a substantial increase in stopping power as compared to your standard E9/E3 brakes.. The kit uses Wilwood Superlite calipers and larger 300mm (11.8″) x 28mm (1.1″) rotors that require 16″ wheels. Only available in hard anodized dark gray finish. NOTE #1: These calipers are single line. You must either switch to a single line master cylinder like BMW #34311150229, or “T” the hard lines then run one line to the caliper. Kit includes: Wilwood Superlite 4-piston calipers NEW made in SoCal E12 Front Wheel Hubs Brake pads Rotors Wheel Bearings Braided Stainless Steel Hoses Thread-in Wheel Studs