We are proud to offer the JXB Performance Driveshaft Center Carrier Upgrade! Each kit comes with everything you need for install. Simply cut your old carrier off, trim the rubber down on the factory bearing, and your JXB Carrier bolts directly around it! The difference in play/slop from stock to JXB is night and day. To order simply select your vehicle from the drop down menu, then select bushing hardness (Street is softer, Track is harder) contact us for any questions! We install these for any local vehicles! Free Standard shipping on JXB Products, Simply select JXB Product/Remote flash option during checkout! You can watch a sample install video for B6/B7 S4 here https://youtu.be/pg0sshyQ45U