All I want is a diverter valve or blow off valve that works with the ETS intake that will NOT leak boost at all. Whats the best out there?

synapse dv.

The COBB XLE BPV is working very well for me at 28 psig.

Is that spiking 28 or holding? I want to be able to hold 25 with no leaks.

28 and holding for me, I have a nearly flat boost profile; that's all the higher I want to run with pump gas on my car. I know Scheides is running his COBB XLE BPV above 30 with E85.