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Never had those problems with mine. I've never cleaned the MAF on my Ranger, and that intake has been on it since 2002. I clean and re-oil the filters yearly. The Lightning has had that intake since I bought it in 2009. So stop spreading false facts. I use Simple Green to clean the filters and good old K & N oil to oil them. Just don't over oil them. That's the reason that MAFs get oily. Most people have a tendency to think "More is better." It's not in this case. One pass, very lightly applied, good to go.
I do believe the factory intake in a 3.0 is restrictive. I replaced mine with smooth tubing and used a later model OEM Ford filter box from a 4.0 and enlarged the opening between that and the hole in the radiator support.
I don’t have any way to measure any difference over the stock intake. So no wild claims here. It just makes sense that it should have improved something. I am happy with what I did.
I do not own a lightning