I have a '99 F150 Supercab 4x4 with the 4.6L Triton. I would like to replace the muffler for a straight pipe (dual actually), but I don't want to ruin the performance or MPG due to insufficient back-pressure. Does any one have an experience or suggestion that may help me decide how to go about this? I love the sound of an engine roaring, but I don't want to do anything stupid.
By the way, I don't care what the law says... :beerbottl
By the way, I don't care what the law says... :beerbottl