Lighter, Bigger and Cooler Big Brake Upgrade! If you need extra cooling from multiple high speed stops, this is the system for you! Works on Opel GTs and Kadett B with front disk brakes. Features: NEW Aluminum Big Brake Calipers. Coated friction ready Vented big brake rotors and optional longer wheel studs for use with thicker wheel spacers if needed. Parts included are: 4006AV New Aluminum Wider Big Brake Calipers (Pair). 4002V New Coated Vented Brake Rotors (Pair). 4010 Semi-Metallic Brake Pads 4067 Wide Brake Pad Hardware kit 4044 Brake hose kit, Stainless Steel 7020XL 52mm Long Wheel Studs (8) 3040 Wheel Bearing Seals (2) 12014 10mm Serrated Bit. Note: Wheel hub needs to be machined down in diameter to clear wider brake caliper. Brake backing plate will need to be modified to clear bigger brake caliper. Will not work with some wheels with out a wheel spacer.