I have seen in speed shops the airaid intake for the 04 05 fords with part numbers 400-140 and 400-140-1 can someone shed
some light on the differences

 

If you would like to call us at our number listed below, we'll be more than happy to go over those details, with you, as we're direct with the manufacturer and know the various iterations & running changes in the Airaid unit for the 5.4 3V F-150 rather well. We can also provide you with great pricing on those units.

(This is the Computer Chips section, so that is not appropriate to discuss here.)

 

I put the 400-140 in my wife's 04 F150. It works great. I also run one in my off road jeep. It filters better than the K&N and gives you a good boost of power.