I wish i would have seen this thread a long time ago. I have been fighting this issue of soft springs on my CO's for the longest time and not sure what to do about it. All you cobra guys are running some hefty rear springs which add credibility to my proposed solution. Any of yall running the Koni 30 series shocks on your rear CO's? What size spring you running? BTW: I have an 03 Cobra IRS in the rear of my car which is why this applies to me.