Ditto what Mbeach said.... 4-4.5 is about right. I don't agree with the Rancho replacements tho. The KYB's you have are gonna be tough to beat IMO. The Rancho shocks are a bit softer... even dialing the adjustables down hard they never felt "reassuring" near the limits. Seems the KYB's were part of the chassis formula from the beginning. Bilsteins may be a better choice, I don't know. I'd spend the money