For BMW X3 E83 xDrive 30 d Genuine Napa 5 Stud Vented Front Brake Discs Pair. We apologise in advance for any inconvenience caused. Brake Disc Thickness (mm). Bolt Hole Circle Diam (mm). The NAPA and NAPA PROFORMER ranges of braking products provide a two-tiered solution to meet all requirements. Designed and rigorously tested to stringent quality standards, NAPA Braking delivers reliable aftermarket brake pads and discs that cover 99% of all cars and LCVs in the UK and Ireland, including electric vehicles. Precision-made using advanced robotic technology, the NAPA Braking range offers a direct replacement for OE parts. NAPA Brake Pads & Discs undergo testing more demanding than R90 and R13 industry standards to guarantee the range meets or exceeds OE specifications.