I just had to replace a right hand Koni strut because of road damage. Koni would NOT sell me just one strut... had to buy two.
Also, get directions on seting the struts, they may not be bad. Start with the strut adjustment screw fully clockwise (should be "softest" position. A quarter-turn counter clockwise should give you good road compensation. My struts say NEVER to go beyond 3/4 counter clockwise.
Check your bearings and upper strut mounts. I found that in my car the bearings were bad.. had to be replaced before adding the caster plates.
