The floor pieces fore and aft of the engine (and extending into the bow) are fiberglass shells with a plywood core. If you're careful you can replace the plywood or reinforce these yourself. I did a couple of the sections on my 91.
"For every complex problem there is an answer that is clear, simple, and wrong." (Henry Louis Mencken)
2005 X2 Viper Red, MCX, Acme 1285, PPass
(previous) 2001 X5, 1991 TriStar 190