If we treat the rn as an 'm' like in "Corney" then we have Dam Kess.
KESS is a software package from Alientech for car/vehicle diagnostics.
"It let's you download vehicles ECU chip data (even if it's encrypted, like on new cars) - which you can then modify using a car map editing software.
Who's it for?…
It's either for home car owners who'd like to save on fuel, improve horse power, adjust driving comfort (like RPM to gear change)…
Or for high-tech advanced car technicians/tuning shops who already tune for customers and need a tuner with a much larger vehicle support. Or even if you'd like to start tuning for money… since it's a highly profitable business… and you can easily charge up to $1000 - $2500 per tune."
https://totalcardiagnostics.com/shop/kess-ecu-remapping-alientech