Join Date: Jun 2009
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Dang, thats nice an 07 STI and an 09 STI. The concept for both are the same. A nice bellmouth designed DP and any style and sounding CBE. Just too bad they are different designs for each now.
CobbTuning.com - Service Bulletin: 07 WRX/STi Overboosting with Catless Exhaust
CobbTuning.com - Exhaust Design
These are two different informative pieces put out by Cobb. One is catless versus catted, just to kind of let you know there isnt much power difference between the two unless you want all the power you could possible squeeze out of a setup. And the other is about the overboosting with a catless system. The later you dont have to really worry about since you have made the decision to stay catted.
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