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). 10-15% More Energy Direct Plug In Replacement Direct OE Fit Advanced Bobbin Technology Standard Motor Products SMP Uf-198 Additional Attributes: GTIN: 00743047140215 Color: Yellow Maximum Voltage: 42000 Package Quantity: 1 Peak Increase in Arc Duration: 23% Peak Increase in Current: 17% Peak Increase in Dwell: 36% Primary Resistance: 1.000 ohms Secondary Resistance: 12.7K ohms Turns Ratio: 76:1 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: 4.9000 x 3.8000 x 3.5000 inches