Yes I did it. At cruising speed if you poush the gas slowly you will hear a small "prrr" wich over time you will get used to or you will enjoy from the first time you hear it. But if you poush hard you will hear like a"turbo" (with out the effect of a turbo) and probably an encrease of aproximately 10-15 decibel in noise. Wich means =A LOT- more noise. About the second mesage= 99% of the time the MAF sensor will be damaged by= to much oil on your filter,(oil wiil depose on the sensor, contaminate and not allow corect reading) or not enough oil(fine dust wich suposed to be stopped by the oil, and oil only, goes thru the filter and it will depose on the sensor ) The best way to check for dust is to open the fitting close to the motor once a month , take a WHITE ,lightly moist, cloth and pass it thru the tube. If you see any dust??? than your filter is not oiled the way it should be(see manufacturer info). If one week latter you see the same thing ??? than trow that filter as fast you can and put back the original one. Now, very rarely you will have the "ceck engine light" that goes ON and that have nothing to do with the sensor. Is more about the FUEL/AIR ratio. I am not smart enough to talk about it. I am prety sure that Gadget will be happy to help you with. About the economy, I did not have enough time to do a real test. But based on my gauge reading - it sips little bit more gas guaranteed. It is expected. When you increase the amount of air that goes in , you have a bounch of sensors that decide that you need more gas also, in order to obtain the right fuel/air ratio. If you go this road ?? you have to know that eventualy you have to recalibrate the engine some how (most of the time with a chip that URD
is working on) in order to really see a benefit. Remember more air is not always good. Need to find the perfect balance. About the waranty??. even if you dont do anything to that truck , when you have to go to the dealer ?? expect to get f,,,,,k some how. Is more about the relation that you develop with the service advisor = ( a dozen of donuts and a tap on the shoulder= How are my friend ???- goes much further then a stiff custumer that wants it done because he deserve it), then what is really writen on that waranty contract. Yes the filter is sold with out warranty. That, does not tell you that, it will void the warranty. Keep every thing you take off that truck and if you have any problem ??? put evrey thing back ,( is one hour job) than go to the dealer if it scarry you.