^^ the MAP senders on the collection tube, so single vs twin is irreverent.
Still though, I wonder if two are needed. Most Autronic / Motec / Haltech setups i see, use only one MAP sender (none, have the difficulty of multi throttles though admittedly)
Seeing as some people don't get good results with the sender tap'd and bolted to the Apexi recommended collection tube, but need to make an aftermarket zone (that reflects the average vac/boost of each inlet runner)... surely one sender, bridged at the ECU (like ppl do with AFM's) could work just as well...
Meh, just thinking aloud.