Specifications: Fits all Model S vehicles with factory 21″ or Unplugged Performance upgraded wheels. (Also compatible with 19″ and 20″ wheels, depending on offset.) Improve braking performance and feel Reduction of 20lbs unsprung weight over for better feel and improved efficiency Kit includes all components necessary for installation (brake fluid will need to be supplied by the buyer, and can be purchased at any automotive parts retailer) The default caliper color is red to match the OEM units, but a wide range of custom colors are also available upon request for an additional fee Kit Includes: 6-Piston monoblock big brake caliper set with all necessary hardware Brake pads designed specifically for use with carbon-ceramic rotors, and are compatible with daily street use Huge 15.5″ carbon-ceramic rotor set Machined Billet caliper adapter brackets and relevant hardware Premium coated stainless steel braided brake lines engineered specifically for Tesla