Why Don't Corvette Engine Covers Get Cool Engine Output Graphs?

So how come Corvettes don't come with a cool engine output graph on the engine cover like the HSV/CSV CR8's LS2 engine? See it up-close below.

Why Don't Corvette Engine Covers Get Cool Engine Output Graphs?

How hard would it be for Chevy to do something similar on the engine cover of the Corvette, Corvette Z06 and ZR1? I mean, come on, how friggin' cool does that look? Right?