Welcome to Performance Shock, Inc.

PSi is based in the Motorsports Industrial Park at Infineon Raceway, (Sears Point) in Sonoma, California. We specialize in Racing Shock Absorbers, Springs and associated suspension hardware. We are a Factory Authorized Sales and Service Agency for all Koni, Ohlins, Penske, Moton, Sachs, Bilstein Racing, KW, JRZ, Dynamic & AST shocks.