they are very high quality stuff, but here is a hence.
ProjectSilvia and SPL parts actually had copy many of Kazaama product but sells it for half of their price.
I bought the SPL Parts forged T/C rod, Subframe Spacers, and my friend bought their rear upper control arm(adjustable).. all of them are great quality, design and dimension is identical to Kazaama, but the price has cut half.
check them out
http://www.splparts.com/
&
http://www.projectsilvia.com/
they make direct copy of their stuff, all CNC machined.