Lethal Mid Pipes

[Big Dummy]

Guys, I have a question about the flex coupling in my mid pipes.. have the lethal set and have had them on for over a year and no issue with them. My question is how much “Flex” should they have? I can grab either pipe and they do not flex. The original ford flex pipes would move a good bit and they broke so that’s why I installed the lethal set. I guess if anyone has these or a set with the woven or braided steel type could just grab the pipe and see how much it moves? I have a slight vibration in the pedals, seat and steering wheel that has not been identified yet, two techs checked it again today and have found nothing so I am wondering if the vibration is exhaust pulsing and having very ridged exhaust piping. Picture of flex coupling for reference.

 

[UNBROKEN]

They should be pretty firm. It’s a vibration dampener more than a flex joint.

 

[Big Dummy]

Thanks for the reply Unbroken, one of my neighbors has the same setup but a different vehicle and his are firm. When I find out what is causing the vibration I will post it in the Driveline Vibration Thread. Have a good day

 

[speedracer05]

Thanks for the reply Unbroken, one of my neighbors has the same setup but a different vehicle and his are firm. When I find out what is causing the vibration I will post it in the Driveline Vibration Thread. Have a good day

Hey Big Dummy (What a great show...) I installed the same on mine and now have a vibration. side note: I recently installed CVF dps as well.
After quite a bit of research, the additional vibration can be resolved by adding a couple of hangers. I will be doing this soon (just installed the mids yesterday).

 

[Big Dummy]

If that works it would be great. I haven’t been posting anything lately due to work and life in general. I haven’t just learned to live with the slight vibrations but still annoyed when I drive. And Yeah, Sandford and Son is a classic. Please post an update once you have the hangers installed. Thank you Speedracer05

 

[edeyoung2]

Guys, I have a question about the flex coupling in my mid pipes.. have the lethal set and have had them on for over a year and no issue with them. My question is how much “Flex” should they have? I can grab either pipe and they do not flex. The original ford flex pipes would move a good bit and they broke so that’s why I installed the lethal set. I guess if anyone has these or a set with the woven or braided steel type could just grab the pipe and see how much it moves? I have a slight vibration in the pedals, seat and steering wheel that has not been identified yet, two techs checked it again today and have found nothing so I am wondering if the vibration is exhaust pulsing and having very ridged exhaust piping. Picture of flex coupling for reference.

I had the same issue with my mid pipes after I installed the cvfab downpipes. The tech that fixed it told me my driver side mid wasn’t all the way up on the downpipe and it was binding it causing the vibrations. He must have expanded the pipe to make it slide all the way on. It did solve the vibration issue.


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[Big Dummy]

I am getting tires replaced in 2 weeks, while it’s on the lift the tech will remove my mid pipes and use the expander, I remember while installing them was Way too hard to slide onto the downpipes. I will let you know if it solves the vibration, I am almost certain it will due to it being the only variable. I have just blocked it out of my mind but recently has started to annoy me. Thank you for the advice, I didn’t think the mid pipes should be so stiff and looking at the mesh both sides seem like they are slightly bound or compressed and holding the pipe while at idle, I can feel the vibration… obviously transmission in Park for any safety officers reading this.