5 1/4". I believe that 6.5" can fit there also but I'm not exactly sure how.
The factory speakers in a 2008 Hyundai Tiburon are typically 6.5 inches in diameter for the front doors and 6.5 inches for the rear. Depending on the audio system option, the rear may also feature a pair of tweeters. Upgrading to aftermarket speakers may enhance sound quality and performance if desired.
go to cruthfield.com
AnswerShould be the same as the 03-04 in which case the front speakers are 6.5" and the rear are 6x9'sTry to use the Hyundai Tiburon speaker adapters plugs so you don't need to cut wires and mess up the electric system, you can get those from eBay or amazon.
According to Crutchfield the front speakers on a 1999 Tiburon are 6 and 3/4 inches.
6 3/4 in front 6x9 in back
Go to Crutchfield.com and they will have all of the sizes of your factory size speakers for your car.
You don't need factory speakers. Just buy the same size speakers and install.
fronts are 6 3/4 rears are 6x9
The dash has 3x5 and the door and rear deck speakers are 6x9. Enjoy. ChicagolandAreaModernMopars . com
2006 E250 speaker size is 6x8"
6x8
6 x 9"