I had that Flowmaster 40 series remove on thursday. After 25 miles, the sound change and it sound like I had no muffler at all. I got arrest by the police and they gave me a warning about that noise. It was so noisy, I could not hear the radio. I don't know if something went wrong with the muffler. My mechanic said to me there was not enough flow and the sound died in the muffler that's why it was so noisy.

Something went VERY wrong ... the 40 is NOT loud AT ALL!!!

__________________
I don't suffer from insanity, I enjoy every minute of it!

#139640 '07 NA Sly Fully Loaded 12/1/07
#106614 12/15/05 NA Sly Traded @ 35k Miles

Be too blessed to be stressed! ~ Joel Osteen
If you get a second chance, grab it with both hands. If it changes your life, let it.

NASSOA(TM)
Founding Member- Council Chair

For sure I am not install another FM. I'm thinking about the MAGNAFLOW or DYNOMAX. What do you think about thoses?

Several on here have Magnaflow!

__________________
I don't suffer from insanity, I enjoy every minute of it!

#139640 '07 NA Sly Fully Loaded 12/1/07
#106614 12/15/05 NA Sly Traded @ 35k Miles

Be too blessed to be stressed! ~ Joel Osteen
If you get a second chance, grab it with both hands. If it changes your life, let it.

NASSOA(TM)
Founding Member- Council Chair

How does it sound and is it noisy inside?