Sierra's MAGFORCE Ignition Wires are "Electronics Friendly" Protecting all of your Electronic Devices and Electronic Engine Controls from RFI and EMI While Delivering the Maximum Amount of Voltage Exact Fit Design Ensures Easy Installation and Years of Trouble-Free Service Moisture-Proof, Molded Distributor Insulators High-Quality Conductive Center Carrier Reinforcement Ensures Conductor Integrity All Sierra parts qualify for and are covered under Sierra's Industry Leading Customer Satisfaction Warranty