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7
Pelosi_Halitosis 7 points ago +7 / -0

They add an engine controller to get more HP than the factory tune, by changing values in the ECU. This allows them to make "fuel maps" and select them for different situations like economy, towing and you guessed it, rolling coal.

4
gnomenclature 4 points ago +4 / -0

Pretty much what I was thinking. The key is to change the value in the ECU.

:D