Maybe I'm being a little slow... I see what you mean but can't find anywhere to log this. Ssd and other adapters all read absolute atmospheric pressure sensor only

 

Update:. Cel issue resolved! , just needed correct maf screen positioning as well as proper balance of air flow between the two bank...

 

Intake restriction is relevant for a naturally aspirated engines. For a forced induction (i.e. supercharger) all your are doing with intake mods is introducing more dust and increasing chances to suck in water going through deep puddles.

What is relevant for forced induction is intake air temperature. If you don't have cold air intake (not sure about XKR, F-type has it) then there are performance gains to be had.

 

When I looked at this I was thinking about adding a 1" ID hose from air box to air box to help balance the pressures to the MAF. I also think the larger restriction is where the tubing goes over the valve cover. Using a manual manometer you should be able to probe each tract looking for vacuum measured in inches of water column.

 

I love when experts chime in😉. Article from Kenne Bell was already posted above , read it ...
And how exactly you figured I would get more dust in using larger size factory filters?