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.

SPECIAL LIMITED TIME OFFER!!! Purchase a select* Ohlins, Penske, Moton, JRZ, AST or KW Racing shocks and PSi will revalve your shocks 1 time FREE OF CHARGE for up to 3 Months from Purchase date. Why would anyone need to revalve new shocks? While many owners will be more than satisfied with the OEM valving of their new shocks, some may need to be revalved for their specific car setup, spring rate, sway bar rate, tire type, driving style and use (Racing, Auto-X etc). Contact Us for details.