This is an optional Revolution Design Racing Products 0/3 RR LRC Suspension Mount. Revolution Design Racing Products LRC (Low Roll Center) suspension mounts are designed to lower the rear roll center and improve handling on medium and low-grip surfaces. The parts are machined from 7075-T6 aluminum, and have been black anodized and laser-etched for easy identification and stealthy looks. These blocks are a direct fit on the RDRP PLUS11 DEX210 aluminum chassis, and are compatible with all other '210 series vehicles, but will require hand fitting on the chassis and suspension arms to provide enough clearance for the A-arms. Package includes a 0/3 RR mount.