Audi A4 2.0L 2016, CV Axle Shaft by SurTrack®. This product features a brand new construction with precision machined and heat treated center-shafts, CV joints, bearings and races. The CV axle shaft by SurTrack is manufactured with high quality neoprene rubber boots to protect against the elements on and off-road conditions and fastened with stainless steel straps to meet the stringent engineering standards.