I have a 2006 with a 5 speed and would like to switch to the 6 speed. Does anyone know if I can do this?

 

Sure, it's very easy. Drive to car dealership. Trade in 5-speed Tiburon for 6-speed Tiburon.

That's the cheapest route to go.

 

Now that's an intelligent answer....

 

Hey, I'm not saying you can't make the swap if you really wanted to. It's been done before. However, if you want the cheapest, least painful and most reliable way of getting a 6-speed, that's they way I would suggest. But hey, it's your money.