Just wondering if anyone has used these?
http://www.turbosmartusa.com/product...l-port-shortie

A friend has one on his Ford Focus ST, and it seems to function just great.

I know there are a hesitation to move to the piston relief valves as some in the past have been stuck.

For the price it may be a nice upgrade for that 'ricer' pssssh

Anyway, I've been on the fence for a while, hoping that my friend's car would end up proving that they'll stick, but so far it's still working great; the sound is great as well; not too loud like some of the others.

 

seem like these vent to atmosphere, so unless your running a blow through setup i dont think you can use them.

 

They only partially vent to atmosphere.
The latest version is hardset at almost 50/50 split, but it's actually slightly more favored to the recirculation.

From what I could tell with my friend's ride, there were no issues with the CEL, even on ecoboost which I'd imagine is much more picky when it comes to it's MAF signal than ours.