Anybody tried the True Flow drop in Air Filters?
Was thinking of adding a K&N or a True Flow drop in to see if there is any performance or MPG increase.
2009 Chevy Silverado 1500 5.3L V8

The True Flow looks like a better filter than the K&N if that helps. The foam filter is a better media than the gauze. May also want to check this out: http://www.gmtruckclub.com/forum/showthread.php?t=19789
2008 GMC Sierra 2500HD Ex. Cab, Fire Red, 6.6L Duramax LMM Equipped with UTG Rocker Pods
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