Centric Parts brake caliper rebuild kits help restore your disc brake calipers to like new condition. These high quality caliper kits include major replacement parts such as O-rings and seals. Designed to meet OE quality, configuration, and fitment. Includes spring, cup seals and dust boots. Made of high-quality materials for long lasting performance. Sold as an axle set for two wheels 2014 - 2016 BMW 228i, 2015 - 2016 BMW 228i xDrive, 2017 - 2017 BMW 230i, 2017 - 2017 BMW 230i xDrive, 2013 - 2017 BMW 320i, 2013 - 2017 BMW 320i xDrive, 2014 - 2017 BMW 328d, 2014 - 2017 BMW 328d xDrive, 2012 - 2016 BMW 328i, 2014 - 2016 BMW 328i GT xDrive, 2013 - 2016 BMW 328i xDrive, 2016 - 2017 BMW 330e, 2016 - 2017 BMW 330i, 2017 - 2017 BMW 330i GT xDrive, 2017 - 2017 BMW 330i xDrive, 2014 - 2016 BMW 428i, 2015 - 2016 BMW 428i Gran Coupe, 2014 - 2016 BMW 428i xDrive, 2015 - 2016 BMW 428i xDrive Gran Coupe, 2017 - 2017 BMW 430i, 2017 - 2017 BMW 430i Gran Coupe, 2017 - 2017 BMW 430i xDrive, 2017 - 2017 BMW 430i xDrive Gran Coupe, 2011 - 2017 BMW X3, 2015 - 2017 BMW X4