The Accel Billetec Performance Distributor Cap and Rotor offers superior protection from "arc-thru" and crossfire. They feature 60k V-rated alkyd compound, stress-relieved at molding to ensure stability. The Accel performance distributor cap and rotor kit also offer corrosion-resistant brass inserts and steel rotor springs to provide high-spark energy flow. High-output racing ignition systems place severe demands on distributor caps and rotors. High voltage, surges of spark current, and high temperatures all have the ability to turn your run-of-the-mill cap and rotors molded parts into liquid.