Like many people with the tokico lowering springs have the issue of the front binding. The first photo is the red tokico 5020F that has less than one inch of bump travel. It rode worse than solid Pogo stick. So I looked far and wide for a fix. The rear end of the car is fine, tons of travel.
I got the dimensions and the tokico springs and the spring rates. I found out a few springs that fit and found that MOOG 80099 fit. But they need to be cut to match the 140lbs/in rate of the tokicos.
I cut the first dead coil and 2 active coils. And if my math is right the rate is close. I will update it when it settles after a nice long drive.
(11,250,000*Wire diameter^4)/(8*numberofcoils*meancoildiameter^3)=spring rate
first photo: old wornout tokico 5020F
second photo: side by side moog spring and tockico
third photo: cut moog spring
fourth photo: on the car