K2-Circuit 88-91 Civic EF/CRX 90-93 Integra DAApplications: 88 91 Civic EF 88 91 CRX 90 93 Integra DA Spring Rate: F 16K R 14K Valve: K2 Race Valve This is our standard linear valve. Damper will get stiffer as the strut travels through its range of motion. This can give some harshness with very aggressive curbs. K2 DS1 Valve This is our hybrid valve. We took some characteristics from the Race Valve and our Digressive Valve to give a good mix of both. The damper is a great option for someone