fusseli
Well-Known Member
Those that distrust the K&N don't know how, and likely have never attempted, looking at actual test data that supports their arguments. They are A+ and the increased flow is part of what the tune relies on. Don't believe the internet myths despite how many parrots there are. Do your own research like used oil analysis and filter tests, there're thousands of them. If you don't have the time think no further than Ford is giving to you with their factor warranty backed tune, and Ford is well known for thorough testing.
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