Originally posted by Mattback
for 280-300whp there is a MUCH better solution to what you want. do a nice t28 bottom mount ssautochrome manifold!
I have to agree here, for 320whp or less I'd go with a t28 of some kind ie: S15 or GTi-R. You'll get your power goal and will have better spool up. I'd even try that manifold Mattback suggested.