I agree with the looks. Looks very old school. I've heard that you really don't see a performance increase until 40mph :/ I could be misquoting though. If you're going to keep your car for a long time I'd say go for it!
2008 Mustang V6 Auto Pony Package.
Mods:JLT CAI, Screamin' Demon Coil Pack, Taylor Thunder Street Wires, NGK G-Power Platinum spark plugs, SCT 93 Octane Tune
You are never going to see any gains from them. Yes they look cool, but any "ram air" effect is negated by the fact that it is not a sealed system. Any pressure built up from high speed air is just going to get bled out.