ACCEL cap and rotor kits offer superior protection from "arc-thru" and crossfire. Features 60k V-rated alkyd compound, stress-relieved at molding to ensure stability. Brass inserts and steel rotor springs provide for high spark energy flow. ACCEL's precision-ground, highly polished compression and injection molding equipment manufactures the finest Distributor Caps and Rotors available. High-performance 60kV-rated tan alkyd molding compound (mineral-filled polyester for late model Ford & GM parts) is used for superior protection from "arc-thru" and crossfire. Compression-molded caps are stress-relieved immediately after molding in special fixtures to ensure dimensional stability. High conductivity, corrosion-resistant brass inserts, and stainless steel rotor springs provide unrestricted spark energy flow.