SK-3561 is Arnott's new rear shock for the left side of the 2005-2011 Audi A6/S6 (C6) and is designed to deliver the stability, handling, control and comfort of the original OE shock. The new shock is built with a custom-tuned damper calibrated to provide a smooth yet responsive ride. This completely new shock includes a new polyurethane bump stop, protective dust boot and new top and bottom mounts. This replacement Audi A6/S6 rear shock is assembled by Arnott in the USA.