The MSD Soft Touch Rev Control installs on engines with a GM HEI ignition, Ford or Chrysler electronic ignition, standard breaker points systems, or an MSD 5 or Blaster ignition (non-CD ignitions). It's adjusted with plug-in modules and comes supplied with 6,000, 7,000, and 8,000 rpm modules. When the engine reaches the set rpm, the Soft Touch circuitry drops spark to certain cylinders, producing accurate, smooth, backfire-free rev limits on 4, 6, or 8-cylinder engines with inductive ignitions.Specifications: Type: Rev Control Compatible Ignitions: GM HEI, Ford/Chrysler electronic, standard breaker points, MSD 5/Blaster (non-CD) Included Modules: 6,000, 7,000, and 8,000 rpm Warranty: Manufacturer's Limited 1 Year Warranty Part Number: 8728 FAQWhat ignitions does the MSD 8728 work with?GM HEI ignition, Ford or Chrysler electronic ignition, standard breaker points systems, and MSD 5 or Blaster ignitions (non-CD ignitions).What rpm modules come with the MSD 8728?It ships with 6,000, 7,000, and 8,000 rpm modules.How does the MSD 8728 limit rpm?When the engine reaches the set rpm, the Soft Touch circuitry drops spark to certain cylinders for a smooth, backfire-free rev limit.{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What ignitions does the MSD 8728 work with?","acceptedAnswer":{"@type":"Answer","text":"GM HEI ignition, Ford or Chrysler electronic ignition, standard breaker points systems, and MSD 5 or Blaster ignitions (non-CD ignitions)."}},{"@type":"Question","name":"What rpm modules come with the MSD 8728?","acceptedAnswer":{"@type":"Answer","text":"It ships with 6,000, 7,000, and 8,000 rpm modules."}},{"@type":"Question","name":"How does the MSD 8728 limit rpm?","acceptedAnswer":{"@type":"Answer","text":"When the engine reaches the set rpm, the Soft Touch circuitry drops spark to certain cylinders for a smooth, backfire-free rev limit."}}]}
