I remember Greg, didn't reply as I have never used this type of baffle.
It should take the sharpness off the exhaust note but by how much, I don't know.
On some old Brit bikes, straight pipes worked well as part of performance tuning but on allmost all Hondas they are a no no.
If you only want the straight pipes for the look and sound and are not worried by the fact that you may be a few bhp down because of them, go for it.
You might also want to consider header wrap. Allthough road bikes do not need this, a lot of people think it looks cool and this also helps stop the pipe resonating as much, resulting in a quieter exhaust note.
Sam.
