those tach's are ghey! who the hell needs a huge 7" gauge sitting on their dash to tell them when to shift?!? i mean come on. if you have a dx, there is a tach wire inside(supposedly, i haven't looked my self) but iheard all you have to do is buy an after market EX model guage face that has a tach( it will be in the circle area that used to be engine temp and engine temp and gas will be combined in one circle area)