Feature a thick 8mm silicone jacket and low 500 Ohms/ft. resistance Ferro-Spiral core material. They deliver up to 5 times more peak energy than competitive products, even at high temperatures over 260° C. The ultra-strong Aramid core and fiberglass braiding provide resistance to vibration and “wire stretch” to make a wire set that is durable and reliable. These are the only cables which are compatible with Twin Cam models with Delphi ignition/fuel injection systems.