* Originally not designed to last over 5 years, as a result Corvettes equiped with eproms need to be replaced or flashed every 5 years to maintain peek performance.
* Eproms are newly reflashed OEM parts. The software contains the latest upgrades that are available including running changes.
Most GM ECMs used until 1995 have an Erasable Programmable Read Only Memory (EPROM) that stores data about the C4 Corvette engine it controls and does not lose its content when the power supply is cut off. EPROMs also contain information specific to the transmission and the car. The EPROM is often referred to as the "chip". The chip is sometimes located in a removable carrier called a MemCal or Calpack. These are rebuilt factory prom chips that include the memcal. Programmed with the most up to date program that was released from GM. An $80.00 core charge is added and will be refunded when the original prom/memcal is returned.