XTC 6-3/4" Speaker Baffles
Crutchfield Customer Review (What's this?)
I got these for my 2004 Honda Odyssey (says that the speakers are a 5 1/4 but can really fit 6 3/4's easily with little to no mods. And these baffles do Wonders!! Seriously need it for any instillation of speakers for any car. Really improved sound volume and quality too!