MSD designed this 8251 Pro Power HVC Race Ignition Coil for use in racing applications with an MSD 7 or 8 series ignition! It features MSD’s new U-Core winding design that produces more voltage and current than previous designs. It also has a tough, rigid Rynite housing with a spark plug style terminal as well as threaded brass primary studs. This coil has a maximum voltage of 45,000 Volts and a Peak Current of 1.1 Amps! The iron U-Core design has a Dupont Rynite FR946 segmented bobbin for improved voltage distribution. This material has incredible dielectric capabilities at high temperatures. The cutting-edge winding material features improved insulation as well as being capable of enduring extreme voltages. Together, these materials create a durable coil with incredible voltage capabilities, lightning quick rise time as well as lengthy spark duration. MSD 8251 Pro Power HVC Race Ignition Coil Features: Coil Type: Drag Race / Long Duration Use Maximum Voltage: 45,000 Volts Inductance: 1.00 mH Peak Current: 1.1 Amps Primary Resistance: .040 OHMs Secondary Resistance: 86.00K OHMs Spark Duration: 150 uS Turns Ratio: 85:1 Coil Color: Red Coil Shape: Square Coil Style: Remote Mount Coil Wire Attachment: Male/HEI Coil Internal Construction: Epoxy Ballast Resistor Included: No Coil Wire Included: No Mounting Bracket Included: Yes Quantity: Sold individually Street cruisers as well as Top Fuel dragsters trust MSD's ignition systems as the industry leader for over 40 years. MSD continues to push the envelope with cutting-edge ignition technology as well as intake manifolds and EFI systems.