So we just installed Turbo XS RFL on my brothers NSRT-4 and after everything was put back together and we started it, the RPMs seemed fine but he is now idling around 18 vacuum. He started out around 12.5-13. Also, when I drove his car it doesn't feel like it's building boost fast enough (I have an SRT-4 also so I know what to compare it to). Then, his BOV isn't that impressive to me. My HKS is much louder at much lower RPMs, and I figured his would be louder. When I accelerate in his car, it runs around 11 psi and doesn't go much higher. Not sure what's going on.