I went to Crutchfield.com to find some aftermarket full component speakers, and I noticed that once I type in my year, make and model, they show what products my car can appropriatly take.

Crutchfield says the 280Z has 5" speakers, but I swear I thought that they were 4" speakers.

the original owner, (dumb arse) decided to have some shitty speaker guys drill holes the center console and mount 2 other speakers, right by the stereo faceplate to the left and to the right. i don't know how or why, but they are the same as the replaced speakers behind my head, appearing to be original size and shape.

So are they 4" speakers or 5"?

I am sorry i can't ansewer your question, but check this out, i don't know if you've seen it or not....

http://www.classiczcars.com/photopost/showphoto.php?photo=1428&password=&sort=7&thecat=500

and....

http://www.classiczcars.com/photopost/showphoto.php?photo=1427&password=&sort=7&thecat=500

I thought this was pretty cool of course i would never have that many amps. Probably way way loud.

....

those subs look just like mine... Even MtX

Just need some sound to over-ride those massive 10's sitting in my trunk

I took a look at mine since the blown originals are still in there.

I think they are 4" speakers cause they are really small. I'm sure you could fit a five inch speaker though cause the frame around the speaker is pretty big.