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Originally Posted by inTgr8r
Do you have a mysterious vibration?
I had a minor vibration issue that occurred this week.
It was mainly noticeable at idle.
When investigating, I found that the welds for the tabs that joined the two S pipes in the section 1 had failed on one side.
This allowed the tab to vibrate against the pipe.
The quick fix was to just bend the tabs up a bit to give them more clearance to the pipe.
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Do you have the resonated pipes or the ones with cats? When I bought the use set of resonated DKF pipes the preview owner had removed the welds, and I was getting a strange vibration/rattling at certain RPMs. I had a muffler shop weld the sections back together and haven't had an issue since.
The perforated metal sheets inside the resonators on my set appeared to be unfixed, so I'm thinking the pipes not being welded allowed for too much lateral flex under load, which caused the rattling. I'm not sure if those sheets were like that by design, but that was my situation.