I have checked Blau & GPR and niether lists Boge struts for the URQ, and Rod at TPC only has Bilstiens. I need front struts but can't find a source. From the current thread for 4k's I am perceiving that the Bilstiens are stiffer than the Boge's? True? If so, I'll prefer the Bilstiens. Recommended sources? TIA Dennis Denver