Anyone here use one of those "power chips" in their truck? Do they work or are they a waste of $$? Im finding out that my 4.6L F150 has its hands full pulling my new travel trailer and could definately use a few more ponies. Im considering adding a power chip and one fo the aftermarket K&N style "air raid" intake systems. The chip makers are showing dyno run sheets showing 18HP gains on the 4.6L and K&N claims their air raid is good for 10-15. So do you guys think between the two I could really gain 25-30HP with these two mods? I think 25-30 would definately help the pulling sutuation!