The installation of the wheel spacers is a easy as changing a tyre! Remove wheel, place spacer on hub of car, place wheel on the spacer, and tighten with the longer wheel bolts. The longer wheel bolts are included in the delivery! H&R wheel spacers improve the look as well as the handling of your car. H&R wheels spacers are "Made in Germany". They are built from a superior-strength aluminium alloy on high-precision CNC-machines Hard-anodised for durability and optimum corrosion protection.Hole distance (bolt circle) in mm: 120Number of holes: 5Center bore in mm: 72,5Lowest offset: FA+15/ RA-27Note: 18b,25Suitability: E46 M3System: DRScrew thread: M12 x 1,5Packaging Unit: 1 pair (2 pcs.) for one axleScope of delivery: 2 wheel spacers and 10 longer wheel bolts, suitable for stock aluminium rims. For aftermarket rims, we require the sizes of the existing wheel bolts!Manufacturer: H&R Track widening: 24 mm per axle, 12 mm per wheel, Lowest offset: FA+15/ RA-27, Scope of delivery: 2 wheel spacers and 10 longer wheel bolts, suitable for stock aluminium rims. For aftermarket rims, we require the sizes of the existing wheel bolts!, Packaging Unit: 1 pair (2 pcs.) for one axle, Scope of delivery: 2 wheel spacers and 10 longer wheel bolts, suitable for stock aluminium rims. For aftermarket rims, we require the sizes of the existing wheel bolts! IdnzbNIh