I ran those in my Montero with some Walmart 6.5ers. But why in your case? You do that, you will lose bass response...big time...unless you are running subs. If you are subbing and you go that route with the plates, I would seriously consider 2 things: 1) A crossover or bass-blocker and 2) Baffles to keep the subs SPL from toasting the deck speakers. I have crossovers even on my 6x9s, passed at 300Hz to help them last longer in my car with the volume turned up (running subs at that freq and below, so no gaps in sound)
Welcome, downwardly mobile yuppies, to the dawn of the Age of Nefarious.
1993 SSEi - FrankenJinx - dead and gone.
1994 SSE (136K strong) - 180* t-stat,HD alternator, most unequipped SSE on the club, XM radio, Kenwood CD/MP3.
2006 Chevy Malibu Maxx LTZ - Custom 2.25" manifold-back exhaust w/FM-80. Probably the only Maxx with this system.