2009 6.2l Exhaust Flex Pipe Removal?

[Davidg159]

2009 gmc Sierra 6.2L

 

I have been hearing strange sounds coming from, what I have isolated to, the flexpipe in the exhaust system. It sounds like the accordian pipe and the external metal mesh are rubbing at certain rpms, creating this "sheen" like sound. Like two very lite metals rubbing together. This sound happens most often in 6th gear, just as I pass through 40mph. As I let off the gas and lose the tension of the engine and let it fall back through 40mph it becomes very apparent. I don't completely let off the gas so it isn't caused by the road surface, it is more based on subtle vibration or harmonics of the engine.

 

I took it to a muffler shop and they told me these flex pipes are junk and I should remove it or I will have to in the future anyway.

 

I understand these have been designed to minimize the jolt to the exhaust manifolds lessoning the likely hood of cracks and malfunctions.

 

Can I get away with cutting it out and replacing it with straight pipe? Or will I really have problems? And will removing this create warranty issues.

[Nytemare]

See my answer in your other post.