In looking back at this, I guess they never sorted it out? Now there is a new "offering" https://www.turbosmart.com/product/plumb-back-em-diverter-valve/
The Plumb-Back is basically an OEM upgrade to have a true mechanical BOV that is routed back into the truck just like OEM so you don't have the "pssh" sound. We carry both and currently have both units in stock if anyone is interested.