3.5 year old bump huh?
cosworth mani waste, get a 2.5i longrunner, I got one for $100 & got to switch to topfeed, not having to delete the new set of tgv's all over again, yay!
thread to flow comparison, stock sti, cosworth, 2.5i longrunner, and a few more, you'll be surprised at the results of the na oem mani vs cosworth's
http://forums.nasioc.com/forums/show...low+comparison