Yes, I suppose an aftermarket maker could copy the structure of the new exhaust. I wonder on the sensors, and of course, there are the software changes.
Then, there are the changes they don't or won't tell us about!
240HP is a lot of HP from a normally aspirated car with 168 CI or so.
Yet, Excellence Magazine implies that there are more HP increased coming in later years from both engines.
Hmmm!
