No caster shims are needed, here how it works, On Hondas, IE Prelude/Accord(Not Type R or SiR-T 99 up) Honda has wut is called a "Radius Arm(Radius link) " Its a long rod that bolts to the lower control arm, just behind the strut fork. This is how Caster is adjusted on Honda models with a radius arm. The radius arm bolts thru the front of the sub-frame. At times after have had accidents or bad driving(road) conditions the rubberbushings/inserts behind the large nut and washer deteriate causing a deviation in the caster .The adjuster shims are used on teh radius rod and not the lower control arm, if you know how check and make sure that yur radius arm bushings arent done for.Hope the images work, yu might want to save and open in adobe.