[2] Straight/[4] 90 Degree Boots; 7 Piece Set; Carbon impregnated fiberglass core Fiberglass braid for added strength Conductive silicone for high temperature performance Prestosil insulation for superior dielectric and heat performance Reinforcing member for added strength "Class E" silicone jacket to withstandheat, cold, chemicals and moisture KEVLAR® reinforced core Ferrite impregnated layer Wire winding for critical EMI/RFI noise suppression Meets or exceeds OE/OES specifications Original fit, function, performance and color OE/OES specified length and insulators OE/OES specified conductor construction Withstands extreme temperatures from -40°F to 428°F Superior conductivity EMI/RFI noise suppression Manufacturing facilities certified to meet Ford Q1, Chrysler Gold Pentastar, TS-16949, QS9000, ISO 9000, ISO 9001, IS14000 standards SAE J2031 Class E wire is rated to resist heat, cold and electrical interference. Other wire sets use class C or D rated wire, ProConnect gives you Class E quality Professional-Grade Aftermarket Ignition Wire Sets SAE J2031 Class E wire rated to resist heat.