With 2 more stickers that ought to get another couple hp too (only joking)....EPA tested the Helix TB spacer...no discernable results+ ZERO improvement..mpg, hp, tq or volumetric efficiency at any rpm.

With regards to the aftermarket oil coated filter....
The 5.4 V8 for example if close to stock can only suck in a maximum of 480 cfm (modifying the exhaust will have no effect- only a cam/head change will enhance this---or a blower) and a flat panel filter will flow 500 cfm. yes the K&N will flow up to 900 cfm (depending on the model), but thengine will still only suck in 480 cfm.

What many view as an issue (is the plastic intake tube with its noise canceling design) actually increases air pressure- the air crosses the path at a 90 degree angle, the pressure is increased proportionally. In this case it also acts as a sound canceling device! At low speeds, this can reduce the flow a tad (which is what most “feel”), but in terms of peak hp/tq, a good high flow filter is all that is needed. If you look at the flow data, WIX HP filters flow 98+% of K&N and have a much smoother flow post filter plus excellent filtering, for a fraction of the price!

If you do an online search for “air filter test” there is a lot of very good information. I would also avoid oil impregnated filters. While they have their purpose in off-road applications, Ford/GM/Dodge all have “watch-out” bulletins where the oil has contaminated intake sensors. - they even have a training video for the techs on this (flatratetech.com) .