Here's the Injen installed in mine:
No problems with mine at all. there's not too much of a performance boost, but it is a bit noticeable and sounds a lot better as well.
side note: damn, i need to clean my engine bay.
2007 LS Coupe
Current mods: Debadged, DC Sports Carbon Strut bar, Eibach Sportlines, Injen CAI, GMPP Performance Exhaust
Planned: Rims/Tires, 2.4 Intake swap, HIDs, SS Bumpers, Eventually a Turbo