Its more a case of not wanting to spend an extra 800 right now when i'm already about to hit my budget cap for the project. I did look around for comparisons, dyno charts, etc... results are somewhat convoluted, with something this - [ http://twinturbo.net/net/viewmsg.aspx?forum=general&msg_id=1944512&forum=general&dtSearch=4 ] - making me think i should hold off on the manifolds till i get the engine rebuilt bottom up (1.5 yrs or so from now). How many of the bigger turbo owners bought these manifolds, and is there anyone who didnt? What differences are they showing? (obviously every car is different)