IdahoCallaway

ya something is wrong, my father in law has a 5.4 and its worlds slower then my 6.2 you would think it would throw a code if it was misfiring

So would it make sense to cut out the stock 3.5" muffler and replace with a high flow 3" muffler to help with some low end torque? Or would a baffled muffler that is 3.5" be better?