The 4.6L seems to become even quieter at idle then stock on many systems, even ones that are extremely loud when you get on it. Your best bet to get a louder exhaust sound at idle is going to be an O/R midpipe combined with a resonator/straight through type system like the Borla Stinger, the LoudMouth, or the Pypes Mid-muffler system or muffler delete catback system.
|