Originally Posted by turtle64b

So to go back to the filter question and R&D. I installed everything, ran no filter, and saw 12.6 psi. My tuner suggested that I put the filter on to protect from grime buildup and we would continue tuning. Yesterday I put the filter on and did some pulls. The most pressure I saw was 7.6 psi, giver or take .5 psi.

To recap:
Filter off: 12.6 psi
Filter on : 7.6 psi

I've had this kit on two cars now and I've threads showing how thoroughly I've searched for leaks or low boost pressure causes. It was this simple all along...