Holy cow,how much do you weigh? I never heard anyone running a spring that huge,8.1 must be for over 350# or more,heck the 5.5 spring is good for close to 300# max than next spring,i would think 6.1 would be plenty,who did the valve job?Trig 313 said:recently added a 8.1 rate spring to my 06 apex gt.... had the shock revalved 20% stiffer compression and 20% stiffer rebound... i had the shock revaleved with the stock spring, decided the spring was not stiff enough, then got the 8.1 spring. wondering if this is enough valving or do i have to have it revalved again.