Sierra 18-5288-1 High-Performance Electronic Conversion KitFits: Most Prestolite V-8 Distributors Resistance Ohms: 0.6; Senses current levels in the coil and adjusts the dwell to maintain peak energy throughout RPM Range; Develops, on average, 4 times more available energy between 3000 and 5000 RPM's; Develops, on average, twice as much plug voltage as point-type systems; More stable timing; Ignition energy sustains/coil life increased when peak current level is reached prior to spark; New Lobe Sensing Technology does not require magnetic sleeves;