These coils feature advanced bobbin technology, highly specialized silicone magnetic steel cores, along with optimized winding, resistance and turns ratios to delivery 10-15 percent more energy than the OEM coils. Specialized high temperature epoxy resists shock and vibration, while increasing thermal conductivity. These are direct plug replacements for OEM coils. They feature bodies and, or secondary towers molded in ACCEL yellow and feature brass secondary contacts (except direct fire coil on plug applications). Super Coil Ignition Coil Optimized Low Resistance Silicon Magnetic Steel E-Core Higher Energy/Voltage Outputs Quicker Starts Improved Idle Quality Resists Shock And Vibration Resists Corrosion Additional Attributes: GTIN: 00743047823521 WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov Extened Information: Emissions : Electronically Announced Life Cycle Status: Available To Order Packaging: Quantity of Each: Package UOM: Dimension: 6.4000 x 4.7000 x 3.3000 inches