ECU P4120534 Super Stock / Pro Stock / Nascar

rumblefish360 said

That number comes up as the Chrysler Chrome box.
The description you give is like the Gold box.
(Gold box to 12500 rpm)
I used the Chrome box in an everyday driver. No issues.
The Gold box is a racing box to be used with a high power coil.

Does your car idle and drive under 2,000 rpm’s?

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Wondering if you are referring to the Chrome/Blue unit (Low RPM). Little difference between the Gold/Black and the Chrome/Black. Apparently both are race only ECU's. Still want to understand what is at risk in using on a street car. What is the difference between the racing ones and other more typical units?