Well... Ordered a new OEM n75 and fitted it today, made sure it was orientated correctly and all that, and got even LESS boost... approx. like 5 maybe 6psi. I was testing my old n75, and while the valve is closed, if i blow hard enough through the long outlet that goes into the TIP a tiny bit of air leaks through. When i blow through the new one its completely air tight but it gives me less boost... So i'm just gonna run the old one for now.