Have you look at the Z engine bay lately?:D Even the relatively small turbos like HKS 2530(the smallest of GT series). The HKS manual said the engine mount must be trimmed/cut to properly install the turbos. The design of the V6 in a engine bay smaller than my beater civic is the main reason why Z32 is stuck with small turbos. Major custom fab work must be done to fit big turbos, which will cost too much money. I think that's why we seldom see Z32 with over 600rwhp eventhough with shitload of mod and $$$ in it. Pretty sad if you ask me.