Top off your GM ignition system with these great new replacement coils. The GM coils have MSD performance in factory style housings. MSD designed these coils by combining our blaster coil experience with e-core coil efficiency. Each coil has a unique turns ratio plus there is lower primary resistance than the stock coil. This all amounts to a bolt-in replacement coil that produces more output voltage. The coils will work with stock ignition systems as well as MSD equipped cars and trucks. Installation tip: If you plan to install an MSD ignition with your GM dual connector coil, use PN 8876 harness for a direct plug-in installation. Direct performance replacement for GM dual connector coil 100:1 Turns Ratio Lower Primary Resistance Produces High Voltage Output Works w/Stock Ignition As Well As MSD Ignitions CARB E.O. Approved Additional Attributes: GTIN: 00085132082261 Inductance: 5.6 mH Maximum Voltage: 44000 Peak Current: 220 mA Primary Resistance: .680 ohms Secondary Resistance: 4.8K ohms Spark Duration: 300 uS Turns Ratio: 100:1 WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov Packaging: Quantity of Each: Package UOM: Dimension: 5.0000 x 10.0000 x 6.0000 inches PDF: 8226