Anyone running two? is this necessary? I have a HK2 super sequential but a second one has been recommended. What does everyone think.

 

I would run 2: 1 near the TB and 1 near the turbo. Right now I have a Greddy Type S near my TB, but I'll be adding a Greddy Type R as well. If you only have 1 then right near the TB is ideal, but if boost leaks past that one then having another near the turbo would help out.

 

If you are having problems with 'boost leaking past the BOV' then you need to replace your BOV. Buy something that will actually work instead of wasting more money on another BOV.

There are a few different theories on where to place the BOV on a car. So that is up to you.

 

I don't have problems with my BOV not releasing all of the boost, but having a second would be good insurance in my opinion.