Grant:
Tony007:

Would a 20 hp bump on TTS even make a difference?

No, but electric turbocharger(s) might make response much better.

they will be installed in 992 turbo models. 991.2 tts is just an improvement over 991.1 tts. unlike carrera where 991.2 is major change to 991.1 carrera.... so I dont expect any super high results from 991.2 tts