ECS Tuning's Complete Performance Rear Differential Mount Kit offers a more engaging driving experience, with crisper throttle response and reduced driveline slop without increasing cabin NVH. and nbsp;.The ECS Tuning Performance Rear Differential Mount and Performance Rear Differential Carrier Bushing Insert Kit was engineered in-house by our leading R and amp;D department, resulting in countless hours of research and testing to establish the best possible design for minimizing driveline deflection while retaining the vehicles everyday driving comfort. ECS Tuning's primary goal was to achieve a comfortable and compliant ride while maximizing performance, and real world test miles put down on multiple vehicles has proven just that.Performance Rear Differential Mount features include: and nbsp;.Tuned polyurethane isolators (70A durometer) selected for a firm yet compliant ride.Precision machined billet 6061-T6 housing for durability and corrosion resistance.Poly material is more resistant to water, ozone, and chemicals, maintaining its resiliency and elasticity longer than conventional rubber.Increased drivetrain rigidity and response.Features include:.Significant reduction in rear differential movement and nbsp;.Billet and amp; black anodized 6061-T6 washers for durability and corrosion resistance.Polyurethane differential carrier insert to reduce drivetrain deflection while keeping noise vibrations associated with such modification to a minimum.Increased drivetrain rigidity and response.Being a relatively simple process, if you're mechanically inclined you should have no problem replacing the mount in your own garage. For assistance with installation for the Rear Differential Cross Member Bushing Insert Kit, please see our in-depth installation PDF available under the Installation tab.Note: This kit is not recommended for vehicles that have severely worn or torn differential cross member bushings. If your bushings are damaged, please pick up replacements.This Part Fits the Following Vehicles.Make Model Submodel Engine.Audi B6 A4 and nbsp;Quattro 1.8T.Audi B6 A4 and nbsp;Quattro 10v.Audi B6 A4 and nbsp;Quattro V6 30v.Audi B6 S4 and nbsp;All and nbsp; and nbsp; and nbsp; and nbsp; V8.Audi B7 A4 and nbsp;Quattro 2.0T.Audi B7 A4 and nbsp;Quattro V6 3.2L.Audi B7 RS4 and nbsp;All and nbsp; and nbsp; and nbsp; and nbsp; V8.Audi B7 S4 and nbsp;All and nbsp; and nbsp; and nbsp; and nbsp; V8