Sub Box for a Tundra

I disagree completely.  What you'll end up with is a flexing, not-necessarily air tight, booming, unstable enclosure.  I've tried building enclosures out of sheet metal and they just don't work.  They resonate like mad even with dynamat and even using 60 gage stainless steel.  I even tried coating the inside with roofing tar to dampen the vibrations, and no luck.  The constant flex destroyed all enclosure parameter calculations giving very unpredictable response curves that changed over time as the enclosure flexed and bent and heated up and developed air leaks, etc etc etc.  It was a bad experiment.  There is no substitute for MDF.

I think that it is funny that I am being told that placing a sub in that compartment won't work when that is what i did and I have pics to prove it. The compartment is not like regular sheet metal since this metal is folded and bent to make it stronger. O well here is a pic for those non believers.

That would be great robbie, thanks ! and btw Tipp, nobody said that it would NOT work as in its impossible to stick a sub in that enclosure, what was meant by that I believe is that A) there is NOT the correct airspace doing it that way, NOR is doing it that way going to give you a solid enclosure.  Its sort of like Putting tires that are too large on your Vehicle without installing the proper lift, they may fit, but you may not be able to steer anymore  =)

~Jay