0-Ohms of Resistance!Improve mileage and throttle response while not voiding your factory warranty. These Coil-On Plug Connectors are a direct OEM replacement that offer no radio interference. Solid stainless steel cable with a unique EMI/RFI suppression ring works great with fuel injection and stereos. Increase power to the spark plug up to 400% over stock. This is the only true solid stainless steel core wire that works with today's computer dependant engine and all race cars. Includes all necessary hardware.