H&R wheel spacer kit for 2015–2019 BMW M3/M4 (F8X) offers 12mm spacers in front and 15mm at the rear with bolts included, widening track and modifying wheel offset for an improved stance. The matched kit is specified for M3/M4 hubs and OE bolt patterns, supplying hardware to ensure correct, secure installation with factory wheels.
H&R 15-19 BMW M3/M4 (F8X) 12mm Front/15mm Rear Wheel Spacer & Bolt Kit