Low Profile Single Plane Intakes

360* means it's a single plane. Offy never made a dual plane which are 180*.

The Dual Port has to separate plenums, 2 sets of runners. They don't join until you get to the port. It's a low to mid range intake for torque and MPG's. Mine is a spreadbore flange. I put a Thermoquad on it for the small primaries. When it got so sloppy on the throttle shaft I swapped to a '86 or '85 Mopar Quadrajet.

I have seen EFI 4 cylinder Fords with dual port intakes. Long rams. There is a valve on the top that opens the bigger port.