Racing logic, d2's, HSD's, g4's, and about half a dozen more brands you see getting around (more so on American forums) are all made in China, in not most in teh same factory. They are rubbish. They under under valved for the spring rates.
EG: the valving in my coilovers with 20kg springs are the same valving used for Civic coilovers using 5kg springs. They are cheap for a reason.