Perfco Performance wheel spacers are precision CNC-machined in Italy from solid billet aluminium, then finished with a durable black anodised coating for corrosion resistance and a subtle OEM-plus look under the arch. Every kit is hub-centric for a secure, vibration-free fit, and most applications are supplied complete with the correct extended wheel bolts, studs or nuts for the vehicle. This listing covers the BMW Z4M (E85) (2003-2009), fitted with a 5x120 bolt pattern and a 72.5mm centre bore. Available widths for this application: 13mm, 16mm, 20mm, 25mm Bolt on. Size Part No. PCD Thread / Fitting Centre Bore 13mm BM101 5x120 M12x1.5 72.5mm 16mm BM001 5x120 M12x1.5 72.5mm 20mm BM201 5x120 M12x1.5 72.5mm 25mm Bolt on BM001-25 5x120 M12x1.5 72.5mm Fitting note: always check wheel arch and suspension clearance for your chosen width before ordering wider wheels or tyres, and torque all wheel fasteners to your vehicle manufacturer's specification, rechecking after the first few miles.Important: All Perfco wheel spacers are sold in pairs (2 spacers). If you require spacers for both the front and rear axles with different widths, please purchase one pair of each size.