Does anyone make a Y connecter for the map sensor so you can run two boxes and both have access to boost pressure.

 

I don't have stacked boxes, but I think that the common method is like daisy chaining them. Generally on a TST stack the TST sees the sensor directly, then the second box gets the TST altered signal. Should have a proper male/female end from there to go back to the truck. Hope that makes sense, I'm pretty tired.

 

Yeah that's the way mine is hooked up now but I think the EZ might work a little better if it could see the unaltered boost signal.