how much would it cost to customize a new 2007/2008 tiburon to be a convertible or would that even be possible?

The roof panel is actually part of the structure of the car as well as the ''A'' pillars that hold the windshield in. The only way to complete this sort of mod is ''shore'' up the body of the car before cutting off the roof panel. I've done this on a permanent convertable ''roadster'' new VW beetle. No retractable top installed. Had to weld ''U'' channel from front to rear & cross brace it to both sides in order to keep the car from flexing in & clamping the doors shut. (The car was a roll-over & the owner still wanted it to be useable) The A pillars r another concern as they may not be strong enough to hold the windshield at its current angle when you're going 60-70 MPH. It may flex enough to break unless u find a visually pleasing way to strengthen the pillars also. Sounds like a lot of trouble but if you're willing to do it, you'd be the only Tiburon Convertible on the road. I'd put the cost at around $4000 to $6000 unless ur a great metal fabricator.