Looking at two different parts fiche, the '03' and '07' use the same battery. The one you get from HDL is a higher capacity than your original. You can get more info from Yuasa http://www.yuasabatteries.com/vehicle_search.aspGWeddie said:I know the 06 and 07 battery is higher capacity, but will is it physically bigger as well? I need a new battery for my 03 and if the newer type will fit I will get that instead. Are there any differences?