Magnecor 7mm Performance Ignition Leads are direct replacement leads for 7mm original equipment carbon conductor leads, but offer superior RFI and EMI suppression. They overcome problems associated with limited-life carbon conductors and poorly suppressed aftermarket spiral conductor leads on modern engines. They feature an extra strong EVA outer jacket for better terminal retention and EPDM insulation.Magnecor's Exclusive Metallic Inductance Suppressed Conductor will outlast the life of any engine. Magnecor lead sets are not manufactured just to be a service item - to further improve reliability some Magnecor leads use different connectors to overcome problems associated with the original set, this being particularly important if the vehicle is used for competition. Stainless steel snap-lock terminals are used for spark plug ends and phosphor-bronze, brass or stainless steel terminals for distributor/coil ends. Leads are individually numbered for easy installation.Magnecor's commitmen