MSD GM HEI Coil 42,000 V # MSD8225MSD GM HEI Coil 42,000 V # MSD8225 Ignition Coil, Blaster Performance Replacement, E Core, Square, Epoxy, Black, 42,000 V, GM, Each Coil Style: In cap Primary Resistance: 0. 600 ohms Coil Internal Construction: Epoxy Coil Wire Attachment: HEI in cap Coil Color: Black Maximum Voltage: 42,000 V Turns Ratio: 70: 1 Secondary Resistance: 8. 90K ohms Inductance: 3. 50 mH Peak Current: 200 mA Spark Duration: 200 uS Mounting Bracket Included: No Coil Wire