I started and let it idle a few seconds and then revved it to over 6K RPM each time. There is a noticeable difference in the quiet inserts and they took just enough edge off that my Wife is not complaining about the new nice deep rich sound and bitchen looks. Attachment 425433Attachment 425417Attachment 425425
On my 2017 XP Turbo tested at 1 meter away from exhaust outlets before and after the Trinity quiet tip installation. Keep in mind this is just a sound meter App so the overall numbers are just relative but you can hear it.