Stock STi Exhaust Spec's - Subaru WRX Forum
 
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#1 Old 11-17-2008, 07:07 PM
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Stock STi Exhaust Spec's

This is my very first post! So if this is dumb sry. but i bought my car with little to no mods. just the way i wanted it. a AEM short ram intake, and a stock STi exhaust. I really wanted some more information on the exhaust. The general spec's/dimensions and where and how it connects and such. Basically I would like to know if that will be good for a while or do i need to upgrade. I really like the sound and would like something similar if i do upgrade. quiet and pretty deep. i feel like i am rambling. i have wanted to write on here for so long and all my ideas as coming out as a rant. sry.
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#2 Old 11-17-2008, 09:03 PM
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Sure, it's 2.5" most of the way. It's perfectly fine for your turbo and proven to be not restrictive even at higher power levels. You don't need to change the catback if you like it.

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#3 Old 11-17-2008, 10:14 PM
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ok

ty for the reply. that is how big i thought it was. just checking. i will just keep that for a while until it is necessary to upgrade. then decide what to go with. probably apex'i, have had one before and was happy with it. next step is DP. still deciding on that one. a lil nervous to start working on that.
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#4 Old 11-17-2008, 10:33 PM
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Don't forget a tune when you put the downpipe on! Either COBB AP, ECUTEK, ETC
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#5 Old 11-18-2008, 12:44 AM
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Originally Posted by mosc View Post
Sure, it's 2.5" most of the way.
The stock wrx exhaust is ~2.25-2.3" until the axleback (closer to 2" there). Definitely does not hit 2.5" anywhere. I don't know if the sti exhaust is different, but I want to say it's not.
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#6 Old 11-18-2008, 09:05 AM
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mosc was talking about the STI exhaust, that's what Natesky said he has on his car, but i have a WRX and i was curious what the exhaust pipping size was so thanks!!
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