Happy New Year All,
I have a 2010 xlt 2WD with 5.4L. I have already installed KN CAI, flowmaster delta 50 muffler, and airaid throttle body; I want more power. I currently have 102k on it, should I rebuilt the engine and transmission, and install a supercharger and 3.55 gears? I was looking...
This week I a had Flowmaster Delta 50s put on my 2010 expo. I had the same concerns as you and they met my expectations. Nice drone, but very quiet on the road and at idle.
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