Measure the pipes but it will be hard to get a deeper sound out of a 5.4 L engine. If the mufflers have been on for a short time give them more time to heat it up more maybe get some stuff out. You could always put cherry bombs on, they would be quiet at first but get louder as fiberglas gets out of them.
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Friday, August 23rd, 2013 AT 12:09 PM