HFC Diameter vs volume question
It may have been answered already, but I couldn't find any information anywhere. I currently have 2.5" FI RHFC into a full Tanabe CBE on my coupe, but realized just how loud it is from outside the car whenever I touch the fun pedal (not straight-piped Mustang loud, but enough to turn heads, which isn't quite what I want. It's also deep at low RPM, almost too deep for me; I like a slightly more restrained sound). I've done some reading and see that the Kinetix HFC (just taking an example, I don't know much about Kinetix) is a 2.25" HFC. That would fit my system better, as right now I'm going 2.5" from the HFC to 2.36" on the Y-pipe which expands to 2.75 midway down the Y-pipe all the way to the tips.
Would going from the 2.5" FI RHFC down to the 2.25" Kinetix HFC have a volume impact? I would probably gain a little bit of rasp due to losing the resonator, but I feel like the decrease in diameter would offset it/reduce the volume. Am I correct in this assumption, or totally wrong?