Re: Need Memory / Calibration module for '90; re: TSB 47-65-03
ECMs are not hot swappable.. But you can use any year LT5 ECM in your 90. The service upgrade is just the MEMCAL that is socketed in the ECM. I would suggest just getting a custom MEMCAL done by Marc for your car.
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1990 Corvette ZR-1 #1051
Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback
Late Model IH - Plenum
Coilovers - 4.10s
Shelby Series 1 - Wilwood Brakes
Custom Interior
NCM Lifetime Member #978
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