Accel S/S Ferro-Spiral Core Spark Plug Wire - Black 171097-KSame features as the 300+ Series such as an extra thick 8mm silicone jacket and silicone insulation eliminates electrical leakage or RFI interference that interrupts electronic ignitions Delivers up to 5 times more peak energy than Screaming Eagle wire sets even at high temperatures over 500 deg. F Ultra strong Aramid core and fiberglass braiding provide resistance to vibration and wire stretch making the wire set more durable and reliable Low 500