I've been using the Dual Port for about 6 months now.....Love the sound and performance....it actually reacts pretty fast and my boost has been ramping to it's peak (28 psi) earlier than with my stock EVO 9 MR bpv....so i am getting full power faster and stronger....the stock valve may have been leaking all this time without me knowing....i am over-all happy with this product and still stand by it.....i have had no problems with the valve until recently....

now for some negative feedback and advice: not sure what is causing this.....but lately....at light throttle and low boost (5 psi and under), in between shifting my motor revs up on it's own, once in a while, like it's continuing to make power (only by a few 100 rpms)....my gauges are reading instant vacuum when i depress the clutch to shift, and my bov has been cleaned and regreased..... my throttle body spring seems to feel loose and it feels like it's not closing fast enough for the bov.....or maybe my bov is too tight....i have been softening the spring but it's getting to a point that i think it's soft enough.....it doesn't happen all the time which is why i am still happy with it but it's starting to annoy me, esp. when i am driving in traffic