I just picked up my ‘27 and will say I expected it to be a lot louder. My Roush F150 (NA 5.0) had a deeper and louder cold start but the idle exhaust rumble is a lot louder on the TRX. I haven’t gone WOT yet but anticipating it will roar a lot louder than my Roush.
Loud AF from the outside IMO. But yeah the 27s supposedly have updated noise cancellation so inside it's pretty silent, it's a line item on my build sheet.