yeah KKR are cheap chinese dog shit, I have one, f**king biggest POS, comparable with ebay shit.
this has been discussed before at length about the elcheapo 'coilover' manufacturers making rock hard spring rates and the same valving throughout their entire range = shitty on shitty bumpy uneven australian roads. It's no coincidence that it's always Silvia owners trying to say that they are anything but rubbish.
Bilsteins with circlip height adjustment and some decent springs go for about the same price new as the cheap shit coilovers. I know which way I'd be going.
I hate people who are tightarses when it comes to modding their imports, why not stick to a falcodore if you don't wanna pay for decent stuff.