| "We did a test on my car going from full 3 inch to coning back to a 2.5" catback system and I kept all the early gains of going 3 inch and only lost 13 RWHP after 6000 RPM with coning back down to 2.5"." [ http://www.twinturbo.net/net/viewmsg.aspx?forum=general&msg_id=2033426 ] Since 2007, this has probably changed quite a bit since we now have breather mods.
 1993 TT. R.I.P. 09.15.2010
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