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Discussion Starter #1
havent heard anyone mention yet wether it is worth using aftermarket WRX up pipes on the STi. All I have heard is that the STi up pipe does not have a precat, would it still be benificial to get an after market up pipe? is the STi pipe a larger diameter than wrx? thanks! :wink:
 

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I wouldnt think it would do much, maybe it would flow better, but I doubt you would notice a difference. I might do it, if Im alread under there doing something else, but I doubt it will be anywhere in my list of mods anytime soon.

Robert~
 
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