I pulled these 4" speakers out of my saab 900, they will fit directly in where the oe speakers went, and they are actually a brand name (Clarion). In addition the magnet (driver?) is a little bit bigger than the stock and it appears to be a true 2-way speaker. The only things holding me back is the slightly smaller diameter and the marking "Nom. 20W on the clarions" when compared to "Max 25W" on the stockers.

What do you guys think.

Note: I will be soon replacing the rears with 6.5 in pioneers, i just havnt gotten around to fabbing a way of holding them in place.

Pictures, left to right: saab, rx-7, saab, rx-7

 

Sure, never hurts to try.