· The Librarian
uhm..ROFL03OrangeSVT said:BTW Copper plugs provide a MUCH better spark over platinum plugs.... the ONLY reason the factory uses platinum plugs is they last longer then copper plugs.
MotorCraft AZFS22C f4 plugs are what you're looking for.
One more thing... if you're going to upgrade anypart of your ignition start with the FRPP wires. With those and a stock coil I have seen well over 500whp in a Focus.