HKS says up to 380 hp.
Spool should be pretty low...boost by about 3500
Don't know what stock boost is at. maybe .65 bar?
Max psi is up there...probably 20-25
2540 is for bigger numbers, but it has weird flow issues...read about it in SCC. 2530 would be better. 2835 is king.
Rebuild is expensive...shouldn't have to ever
Don't know about oil/water lines
Should cost about $1900 <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'>
I know you wanted replies from "experienced" people...but no one had answered yet. I like the HKS turbos...but I don't know why you would get the 2540. It's a very mismatched turbo. Get the 2835 and watch your HP numbers hit ~400. so much fun. I'm going that route in the future. But I have many other mods before I'm ready for that. I think I'll just turn up the stock T25 in the meantime. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='

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Eric