Febi Bilstein Brake Disc - 171424 - Pack Of 2. These brake discs are vented and designed for the front axle with an outer diameter of 256mm. Key specifications include a thickness of 24mm, minimum thickness of 22mm, a bolt hole circle diameter of 100mm, and a centering diameter of 59mm. The discs have 4 rim holes and 2 mounting bores. They are coated and internally vented, with a weight of 5.7 kg. The part is compatible with Chevrolet (GM) models using part numbers 96471275 and 96534660. Please use the vehicle identification tool to confirm compatibility. Installation by a competent individual is recommended. These products are designed for their original intended use and should not be modified.