Originally Posted by ronn1

Here's a VID:

FI Exhaust and FI HFC (not resonated) vs Nismo CB with Megan RESONATED TPs. You can see how raspy and loud the Resonated TP is compared to FI HFC (NON Resonated). Resonated HFC would be even MELLOWER (I have FI Resonated).

Infinti g35 coupe - nismo catback exhaust (after test pipes) - YouTube

BTW..I already gave you answer on relative HP gains TP vs HFC. I suggest you search if you want to get more in depth on that topic.