Ya. Sorry I should have explained more. I have custom exhaust done so don't have the split air pipe from the original exhaust. The air pump right now is not doing anything, but I'm going to rig up a system that uses the air pump to actuate the ports.

The only reason I mentioned that I still had the air pump is becuase you need it to operate the VDI.

So anyways, back on topic. If anyone has any input on using the VDI and UIM on a ported s4 engine.