My research indicated that FK is a spring manufacturer and their shock absorbers are made for them by Koni. I am running a pair of those back dampers on mine. Beware, they are unlikely to be a direct fit at the bottom. The width of the bush was too wide for my axle and the bolt hole is a larger diameter than stock. I used an angle grinder and a bit of brute to get them in. I reused used the original bolts, there isn't much load on it.