Opening it up even more it's going to sound really
Ricey raspy above 4k.
You're changing the sound level from a subtle aggressive designed at certain db level to a louder not so great rasp sound.
The sound change is noticeable like going from a stock hfc to test pipes.
I don't like the sound change with the test pipes myself so kept mine with the hfc's.
It was engineered with a certain note in mind at higher rpm's and altering it to make it louder is just going to ruin it's unique exhaust note.
If you want something louder find another exhaust to butcher
Thats just my opinion as this is a subjective topic.