NGK Spark Plug Wire Set is designed specifically for noise suppression and superior conductivity. It is constructed from durable material which enhances the overall strength of the wire providing a super strength backbone on which the various layers of the wire assembly are formed. This wire set uses high quality EPDM and silicone coverings to resist heat, oil and chemical damages for increased durability. Each ignition wire is fitted with a positive locking, corrosion resistant stainless steel terminal end for tight fit and maximum resistance to vibration, separation. It is numbered for easy cylinder identification and coil wires are color coded for correct and easy installation.