I contacted brenspeed about the whole vortech and winter driving thing. They said basically it is in the user manual to cover the companies ***, but they have well over 100 kits being run in the winter, even in canada and alaska, with no issues. They haven't seen any warranty issues related to temperature.

 

+1, I believe it was mainly more of an issues for the V2 then the V3 because of how they are lubricated differently.

 

I believe the bypass valve is very common in late model positive displacement blowers. I can't say for certain which models have it but I believe most if not all the twin screws for our cars do, and I'd be willing to bet the TVS blowers have one as well.

As far as having a valet mode, unless someone corrects me on this, I think KB is rather unique on this feature.