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MSD 7551 Launch Rev Limiter Switch Box

Change your launch rpm on the fly with this controller. No need to dive into the ProData Software. For use with Programmable Digital-7 Plus Ignition only.;Instantly changes the launch RPM setting of the Programmable Controls; Two control dials, one for 1,000 RPM and another for 100 RPM; Adjustable from 1,000-10,900 RPM in 100 RPM increments; Can only be used with programmable MSD Ignition Controls and Accessories;