Just checking up for the first time in 3 months, and wanted to chime in and say that I ran with Muffler Deletes for about 1 week. Hope you don't mind a headache after you get out of the car...
For me, at least, they were WAY too loud, at all throttle levels. They just never quieted down, relentless. Headache.
Skip Them, you'll thank me.