2 years? Lucky, very lucky. I don't remember how long mine lasted, but it was just a couple months. The incorrect plug wire theory is incorrect. I used MSD wires on it at the time, they were new too. Toward the end, truck only ran good when it wasnt under much load and with alot of throttle. Didn't have as much power either. Even when it was new the only real benefit was it'd start faster but as it turns out my old coil was bad anyways.