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BlackJack · 02-07-2007, 02:56 PM

billy, the difference is in turbo or N/A.

with turbo, you need max flow to get out of the engine, fast as possible.
with N/A, you need some backpressure to retain low-end torque.

so.....with N/A, 2.5"
with turbo, 3"

02-07-2007, 02:56 PM	#7
BlackJack Jack-Wagon Join Date: Mar 2005 Location: Houston, TX Posts: 3,834	billy, the difference is in turbo or N/A. with turbo, you need max flow to get out of the engine, fast as possible. with N/A, you need some backpressure to retain low-end torque. so.....with N/A, 2.5" with turbo, 3" __________________