Good sound - ricerness = no glass-pack. I have had one for 3 years and it's been driving me insane for 2 of them. If you're worried about back-pressure, again, no glass-pack. A glass-pack is a straight through design and with no cats, I don't think you could make it long enough to get adequate back-pressure, but I'm no auto tech.

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2004 Ford Ranger, 4.0L, 5 Speed Manual
Leveled, 32/10.5/16 (Metric) BFG All-Terrains
Fab-Tech Light Bar w/ KC Daylighters
'06 Taillights, Clear Corners
Future Mods:
5.0 Swap (Handbuilding motor)
SAS or 6" IFS Lift