Amazon says this Odyssey fits GTs. http://www.amazon.com/Odyssey-25-PC...02-2125-1-1-2683--2-0&sr=1-2&ymm=2006:ford:gt However, the height is listed as a bit more than 1" taller than the Optima. 1" taller will not fit. There is essentially zero clearance between the top of the Optima and the trunk tub.
Buy the Optima from Amazon http://www.amazon.com/Optima-Batter...02-2125-1-1-2683--2-0&sr=1-1&ymm=2006:ford:gt and get a three year warranty. For warranty claim, you just email Amazon and they ship you a new battery. No charge, no pro rata, free shipping. You dispose of your old battery.
I know this because I had an Odyssey AGM fail in one year. :lol
Buy the Optima from Amazon http://www.amazon.com/Optima-Batter...02-2125-1-1-2683--2-0&sr=1-1&ymm=2006:ford:gt and get a three year warranty. For warranty claim, you just email Amazon and they ship you a new battery. No charge, no pro rata, free shipping. You dispose of your old battery.
I know this because I had an Odyssey AGM fail in one year. :lol