best air filter for a 03 f150 5.4l

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You're opening a can of worms with that question. I use Napa Gold (Wix) filters myself, and probably would on any car I own that they are available for; otherwise I'd go OEM.
 
I've sold lots of Motorcraft filters, they don't become flimsy in damp weather like I've seen with other cheaper filters, but they're pricey. STP was a refreshingly inexpensive change on my old Toyota Sienna and my Saturn car. Can of worms? yes.
 
The best you say. Well in my opinion its the new Amsoil FlowZair.

2003 FORD TRUCKS F150 PICKUP 5.4L 8-cyl VIN Code L
FILTERS
Oil Filter......SDF11
Air Filter......TS191



[ December 20, 2003, 12:12 PM: Message edited by: Mike ]
 
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