i am thinking of trading my cursed RFL for one of these. The spring/piston is super light but I am told that it hooks up differently than our stockers do so it holds boost better. Anyone have experience with these?

 

Ive always ran Tial BOVs and so far have never had a problem with them.

 

I appreciate the info, but I know Tial is good, just like forge, mr's and several others. I just don't know anything about these, but it seems a lot of Porsche guys run them and are really pleased. I didn't know if anyone on here had ever tried.

The reason I am told they are better is because instead of a spring holding the valve closed against pressure trying to open it, the diverter valve is mounted reverse of how ours are so the boost pressure actually holds it closed. The spring is very lose in it, as in you could open it with your pinky finger loose, but that is because even a very small amount of vacuum is supposed to be able to open in.