The only one that can stand up to the job (Well there is prob others!)....The Greedy type-R BOV. This puppy is huge! Approx $600
I had 2x Turbosmart's on mine....But I have just put the factory ones back on, as the T/S's vented into the atmo, and made the car run like sh1t! idled like crap, stalled at the lights, fluctuated through gear changes,and ran the car rich/lean!
Factory ones are good for 600 odd horses....No need to change!
Unless you have an after market computer that you can get rid of the AFM's, and run atmo BOV's ....Stick with the factory Pssss makers!
CV