http://www.1stsubarudealer.com/injen-subaru-intake/
Can i install a blow valve in a stock subaru wrx sti?
It’s a 2007 wrx sti.I already have installed injen intake(cold air), hks carbon ti exhaust, and high flow cats
Well the Sti already has a blow off valve So why would you want to intall another?/?
Yes you can replace it with After market one which will probably be of a lesser quality but It will not add any performance so why?? If your looking for the noise you can simply divert the air from recirculating to the intake, plug the intake and the vent the BOV to atmosphere.
Edit; Venting to atmosphere will not produce any loss of power or any change in the vehicles tune. The bov is only open when there is vacume after the buterflys and boost before them. (off throttle or durring spool depending how stiff the spring is.) durring this time the engine is either in F/C and not producing any power or it is just starting to spool in either case the recirculated pressure is in no way adding any kind of relevent pressure to the pre turbo intake track beacause the volume of air being realeased through the BOV is very small when compared to the size of the intake which is wide open to atmosphere via the air filter.
edit again; bypass valve is just another name for a BOV they are the same they both have preload spring and they both have a vacume port! and again Venting to atmospere should not affect tune because when its open you are off the gas which means the ECU is in fuel cut! and even if it wasn’t it doesn’t matter because the bypass valve just recirc’s the air back into the pre-turbo intake which is not sealed to atmosphere it does not in anyway pressurize the pre turbo intake.
Injen 08+ STI / WRX Cold Air Intake – Whats in the Box?
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