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Evo 9 BOV for Ralliart

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Old Apr 18, 2017, 07:20 PM   #1
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Evo 9 BOV for Ralliart

A friend of mine gave me a spare Evo 9 BOV. Is there anyway to test this prior to throwing it on my 2011 Ralliart? It looks to be in decent condition but I know he drives his Evos hard.
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Old Apr 18, 2017, 07:47 PM   #2
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Drives: 2003 EVO VIII // 2011 Ralliart // 79 Camaro

If you currently have a stock plastic bov, i'm pretty sure the 9 will hold more PSI even if it has a lot of miles. the Metal BOV's really hold up well IMO.

But if you have an air compressor and some adaptors you can test it... or just throw it on the car to test it. Should be super easy sway.

Last edited by DontStopMe; Apr 19, 2017 at 07:02 AM.
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Old Apr 19, 2017, 11:14 AM   #3
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Drives: 2011 Ralliart

The stock ralliart bov is plastic and known to leak, especially if you up the boost with the GST basemaps as many do.

I would suggest it, I noticed an appreciable difference when I switched, between it being metal instead of plastic and Evos run higher boost than ralliarts so even if the spring is a little weak it should hold more boost than the plastic leaker.
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Old Apr 20, 2017, 07:01 AM   #4
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It takes two seconds to swap it out with no tuning required.
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Old Apr 21, 2017, 12:23 PM   #5
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Yep. Just install it.

You will need a longer vacuum hose (and lay it over the stock air box intake tube - so it does not have to make a sharp bend (and kink the rubber hose).
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Old Apr 21, 2017, 01:27 PM   #6
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Drives: 09 WW Ralliart

they work much better. That's the one that I am using
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