EDM-730 Engine Monitor Upgrade Upgrade your EDM-700 to the EDM-730! Uses existing system wire harnesses, probes, and transducers. Indicator Only - Functions with Existing Probes & Options Note 1: Core charge of $300 will be automatically added to order. Core charge is refunded once valid core is returned to JPI (manufacturer). All cores must be sent direct to JPI. Note 2: EDM 730/830 fits in a 3-1/8" hole and is not a direct slide in for the EDM 700/800 2-1/4" units. This upgrade program will allow you to swap out your 700 to the new 730 or 800 to the new 830 as the new 730 and 830 use a standard 3-1/8" mounting hole. The 730/830 will use the same JPI probes and will better display engine parameters with this plug and play upgrade. Learn more about the EDM-730 from JP Instruments here