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The 42/48 turbo is great between 12-18psi on the BP 1.8. It has quick spoolup and great top end. Don't expect it to push efficient CFM past 18 psi unless your running C-16, then it should flow decently but not over 20psi. That turbo is good for 300whp under 15psi, so it should suit just about most of the drivers out there.
-Braden
'05 WRX
GTX Groupbuy is Closed! However you can still pick up a GTX motor for only $925!!! PM me for order details!
I'd lean more toward the newer GT style turbos... T series are the older tech, though well proven. You can even bolt some of the new ones onto the exact same manifold.
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