Because there are a lot of people in this forum who have a lot of experience with installs and it's USUALLY more enjoyable to get my info here.How about picking up the phone and calling Crutchfield, they should be able to tell you that or you can use their website's install guide. You don't have to buy it there just check to see what fits.
Crutchfield doesn't sell Eclipse.I just went to crutchfield to find out what HU would fit my vehicle.Really simple to do also.
Umm you sure about that? They have been for the past year. You may want to recheck..Crutchfield doesn't sell Eclipse.
The depth of the deck varies though, and some are too deep for some vehicles