Shock SZ/SL 7in Wrap-Up Valving

The BILSTEIN Shock SZ/SL 7-inch Wrap-Up Valving shock absorber is a monotube damper engineered for vehicles requiring precision damping control across varied driving conditions. This is a single shock unit (sold individually) designed to replace factory or worn suspension components on compatible vehicles, with verified specifications including 13.15 inches compressed length, 20.08 inches extended length, and a 1.81-inch outer diameter. The C1-R9 digressive valve architecture allows the shock to respond differently to low-speed and high-speed compression events, delivering responsive handling while maintaining ride comfort.

BILSTEIN's monotube design houses the piston and valving in a single oil-filled tube, eliminating a separate reserve chamber and reducing overall weight compared to traditional twin-tube designs. The digressive valve configuration means damping force increases more steeply during aggressive suspension articulation, which helps control body roll and dive while maintaining suppleness over small road imperfections. Steel construction with zinc plating provides corrosion resistance in salt-air and high-moisture environments. The shock measures 3 x 3 x 22 inches and weighs 3.75 pounds—dimensions critical for verifying fitment before purchase.

This shock suits drivers upgrading from OEM suspension who want improved damping performance without full coilover conversion. Compatibility varies by vehicle year, model, and suspension geometry; verify fitment against your vehicle's factory shock specifications before installing. Sold as a single unit—most suspension upgrades require four shocks (front and rear pairs) for balanced performance across all wheels.

BILSTEIN positions the SZ/SL series in the performance-oriented OEM-replacement segment, bridging factory reliability with enhanced control. Part number 33-321561 allows exact cross-referencing during procurement and ensures you receive the correct valve configuration for your application.