MSD Digital Multi-Retard | 8975

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The Digital Multi-Retard provides four independent, adjustable retard stages (0°-9° each, up to 20° total) plus an optional start retard circuit programmable to 5°, 10°, 15°, or 20 ° while cranking — all without separate plug-in modules. A high-speed RISC microcontroller holds timing accuracy within 1° and includes a built-in magnetic pickup compensation circuit for rock-steady timing with a variety of mag pickups. It works on 4, 6, or 8-cylinder engines and must be used with an MSD ignition control.Specifications: Brand: MSD Category: Engine Product Type: Retard Control Sub Category: Valve Train Components Warning: California Proposition 65 Warranty: Manufacturer's Limited 1 Year Warranty Part Number: 8975 Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).FAQHow many retard stages does the MSD 8975 offer?Four independent stages, each adjustable 0°-9°, for up to 20° of total retard.Does the 8975 need separate RPM/retard modules?No, all stages and the optional start retard are programmed digitally with no separate modules.Is the MSD 8975 legal for street use?No — it's legal for sale and use only on Racing Use Only vehicles (unregistered competition vehicles never operated on the street). Installing it on an emissions-controlled street vehicle is against the law.What does the 8975 require to operate?It must be used with an MSD ignition control and works on 4, 6, or 8-cylinder engines.{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How many retard stages does the MSD 8975 offer?","acceptedAnswer":{"@type":"Answer","text":"Four independent stages, each adjustable 0°-9°, for up to 20° of total retard."}},{"@type":"Question","name":"Does the 8975 need separate RPM/retard modules?","acceptedAnswer":{"@type":"Answer","text":"No, all stages and the optional start retard are programmed digitally with no separate modules."}},{"@type":"Question","name":"Is the MSD 8975 legal for street use?","acceptedAnswer":{"@type":"Answer","text":"No — it's legal for sale and use only on Racing Use Only vehicles (unregistered competition vehicles never operated on the street). Installing it on an emissions-controlled street vehicle is against the law."}},{"@type":"Question","name":"What does the 8975 require to operate?","acceptedAnswer":{"@type":"Answer","text":"It must be used with an MSD ignition control and works on 4, 6, or 8-cylinder engines."}}]} Show more