So I did a muffler delete. Sounds amazing, Only problem is that at lower rpms it feels like its bogging. It didn't do that before the delete. I used the stock tips. Idk if that could be a problem or not. I did see some one talking about plugging a hose but haven't been able to find that thread. The choking or the bogging is really felt between 3k-3.5k rpm. Thanks for any help in advance!

 

What model E60 do you have?

 

2009 550i sport version with the 172 wheels and M bumpers.

 

Hmmm..I have the same setup but I do not have a problem with bogging. Maybe someone here could chime in that has had a similar issue

 

by removing the cats, and I'm assuming you added straight pipes in place, you've changed the way the exhaust flow. You have to try to mimic the stock exhaust flow or others might call it back pressure.

You can replace the straight pipe with a more narrow pipe to try to reproduce some of the exhaust restriction.