Muffler Delete and Fluttering Noise

[TBittner]

For the last couple months i have been noticing this fluttering whistling noise(not turbo). The noise was usually under hard acceleration that would start around 1900RPM through 2200RPM then disappear. It would happen easier if i was hauling or under hard acceleration.



I took to dealer and dealer reports back that everything is fine and he was able to replicate sound and said that this was due to the fact that i had the straight pipe and something to do with back pressure.



Anyone ever heard of this before? I searched a little but didnt find anything i liked?



Thanks

 

[ABorgardt]

i just put mine a few weeks ago. ill listen a little louder and let you know if i can hear anything similar to your explanation.