I used to be a regular here when my 01 was new, but have drifted away with just an occasional visit to skim the forums, but I am preparing to replace my 01 with a 2011, and have some questions. My 01 had the trailer package, which was unusual then, and it consisted of the 4.0 SOHC engine, the 4...
I have an F-150, all stock with 5.4 engine (8200 gvw package) that I use only for hauling and towing. I was wondering if replacing the stock muffler with a more open one would give me any better performance/mileage.
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