91181 The Ignitor II has many of the same great features that the Ignitor has, but its smarter. Ignitor II units sense the coil current level and use a powerful micro controller to adjust the dwell. Variable dwell helps to maintain peak energy throughout the entire RPM range. Ignitor II systems develop up to 4 times more energy between 3000 and 5000 RPM than standard ignition systems. High RPM performance is improved when used with the Flame-Thrower II super low resistance (0.6 ohms) 45,000 volt coils.Features: Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performance. Develops on average 4 times more available energy between 3000 and 5000 RPM, and 2 times more available plug voltage. Compensates for inherent electronic delay by adjusting the spark timing throughout the entire RPM range. Synchronized peak current and spark timing reduces heat build-up. Senses startup and develops more energy for quicker, easier starting. Built in reverse polarity and over current protection shuts down the system, preventing component damage. Epoxy molding makes our module impervious to dirt, oil, grease and moisture. Will trigger most CD ignitions. Legal in all 50 states and Canada. #D-57-22 Guaranteed for 30 months... The item "Pertronix 91181 Ignitor 2 II Multiple Spark Ignition Module GM Delco 1957-74 V8" is in sale since Tuesday, February 23, 2016. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Ignition Systems\Electronic Ignition". The seller is "midamericawarehouse" and is located in Kansas City, Missouri. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Sweden, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Mexico, New Zealand, Switzerland, Norway, Ukraine, Croatia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bermuda, Bolivia, Ecuador, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Cayman islands, Liechtenstein, Luxembourg, Monaco, Martinique, Nicaragua, Peru, Paraguay, Uruguay.