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If I were to get one of these, which one would be better on the Focus ST?
You could go for the Turbosmart Kompact; small for easy install and adjustable for the best of both worlds.
 
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I have the Mountune BPV. It is superior quality over stock, and on par if not better than any other aftermarket BPV for our car. It's a direct swap, no tuning adjustments required. If you are not specifically looking for the sound that a BOV provides it's a no brainer imo.

Next I would say Boomba now makes a BPV along with their popular BOV. I like Boomba products and they have great customer service.

Those would be at the top of my list. I didn't want to vent to the atmosphere so it was between the Mountune and the Boomba BPV for me. Quality of workmanship would be a win either way. I chose Mountune for 3 reasons, it resembles the stock valve in size and shape, so since I'm still under warranty and stock but that and tune I wanted to fly under the radar a little more if I had to go in for a warranty issue, I was hoping they would over look that, opposed to having a different designed piece that was anodized and in your face more, second it was slightly quicker/easier to install, you have to modify the solenoid bracket for the Boomba (talking like a 5 minute difference with good tin snips, it's a stretch I know but, I honestly thought about this), and without a group buy on the Boomba Mountune is cheaper.
 

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Pardon my ignorance on the mechanics of a Turbocharger, as it's new territory for me. I looked over at the Mountune website, and didn't see a "BOV" listed, just an Air recirculation valve. Are they one in the same?
 

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Pardon my ignorance on the mechanics of a Turbocharger, as it's new territory for me. I looked over at the Mountune website, and didn't see a "BOV" listed, just an Air recirculation valve. Are they one in the same?
A BOV vents to atmosphere and a recirculation valve discharges back into the intake side.

Sent from another garage.
 

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A BOV vents to atmosphere and a recirculation valve discharges back into the intake side.

Sent from another garage.
So I'm coming to the conclusion that the ST comes from the factory with a recirculation valve. Or am I wrong on this one?
 

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Love my turbosmart dual port BOV, no tuning required, plus you get the head turns. If you want the sound BOV for sure like mentioned above, otherwise mountune makes a great direct replacement. Mountune parts are top notch if you ask me
 

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So I'm coming to the conclusion that the ST comes from the factory with a recirculation valve. Or am I wrong on this one?
Yes it does. Pretty much all cars that have a turbo come with a recirculation valve. It keeps things more quiet for the average person.

Sent from another garage.
 
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