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I got a quick question, are the Bypass valves on the 06 wrx the same as the STi, for some reason stock for stock the sti bypass sounds louder anyone know why?
Join Date: Sep 2004
If you want to know if they are the same,look up the Subaru part #'s for them....
Homebrewed tuned with Opensource!
Join Date: Aug 2007
STi runs slightly higher boost from the factory, doubt the 1 psi or whatever it is is enough to effect sounds that much.
Join Date: Dec 2006
Thats dependent on the year of the car also, to how much boost its running.
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX
Join Date: Aug 2006
they're the same. the jdm bpv however is rated to hold around 25lbs of boost.
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