Don't Let You Plug Wires Be The Weak Link In Your Ignition!Each Accel spark plug boot is precision-molded to fit you vehicle-no universal one-size-fits-all substitutes. The high gloss 8mm double silicone wire is rated at over 550°F. With a resistance of only 150 Ohms/foot, plus the heaviest gauge spiral-wound alloy conductor in the industry, you'll get maximum voltage potential and amperage at the spark plug. These wire have unsurpassed EMI-RFI (radio-noise) suppression, so it won't affect any electronic equipment in your vehicle. For peak system performance you can see and feel, insist on Accel 300+ ThunderSport wires!