About a yr. ago replaced the rear shocks on the wife's 05' 60k mi. Ford Focus ZX5 w/KYB GR2's. The car rode very stiff and felt every imperfection in the road w/the GR2's. Jarring ride over larger/deeper bumps. (I will say the shocks did settle down a bit from new but after 1yr. no where near acceptable for a comfortable/ subtle ride.) So, they really are 20% are stiffer as per the manufacturer. I don't buy into the need for this extra stiffness because the the other suspension components are wore and shock extra stiffness is needed. I replaced them w/Gabriel "Guardian" shocks which are OEM replacement equavalent. MUCH, much better. I learned a lesson. Just a heads up to anyone else considering buying new rear shocks for a light rear-ended car.