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Maybe someone has access to the Subaru parts catalog and can confirm or deny whether there was ever a change to the model number of the exhaust (any part) between 2008 and 2011 models (for the 5-door).

I drive a 2009 and heard a 2011 go buy and was convinced it sounded a tad louder. I'm also trying to figure out why my tuner is telling me my 2009 with just a DP won't make the same numbers as the 2011, unless you get an aftermarket catback as well.

Any help would be appreciated. Thanks!

Ken
 

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The downpipes are ever so slightly different. (the catalytic converter to be exact)

The mid pipe back is exactly the same.

I know that a stage 1 11 will make more power than a stage 1 08-10 but I don't see why they would be any different at stage 2 levels.
 
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