The message
from Chris Bacon contains these words:

It seems to me that in many modern production cars the "performance
tuning" has already been done...

Yes - and no. In many cases there's only minor differences between the
rip-snorting version and the grandad version - one is just a crippled
version of the other. Priced accordingly.

--
Skipweasel
Pay no attention to that man behind the curtain.