I have treats cdi, Picard 2041 coil and resistor boot. I run resister plugs. I have everything grounded to the frame. I have been lucky and it has lasted 3 seasons. However two other guys in Charlotte have had trouble with them. One guy has gone through about 3 in the same amount of time and other guy went through 2 in a few months. It could be the grounding of the coil and box or it might be the quality in which they made.