The Pro 14 manuals says to use non resistor spark plug if possible, the stock plugs of the STi is resistor type. I don't know if I can safely put a non resistor type with my STi if I use M&W Pro 14. The only experience I had with a non resistor plug was with my former Evo 5, I was sold a non resistor plug by a local shop here, my odometer died and my rpm was not functioning while the non resistor plugs were in my Evo 5. After I replaced the non resistor plugs with the stock plugs, my tachometer functioned again but my odometer permanently died
anyone ever tried putting non resistor plugs with M800 PnP ecu and using CDI ignition? thanks in advance