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    1. #1
      Join Date
      Oct 2007
      Posts
      1,838

      Flex pipe.. Why?

      I am noticing some builds are using Flex pipe. like this.. on RWD builds.. these were originally used only for transverse mounted engines since the torque of the motor made solid mounting an issue.. .. so I am wondering if I am missing something as to why this is a thing? It it just a trend or is their some material value for a RWD car that I am missing..

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      From a place you will not see comes a sound you will not hear....

      67 Camaro In progress

      https://www.pro-touring.com/showthre...-Tap-67-camaro


    2. #2
      Join Date
      Jul 2018
      Posts
      5
      I put them on mine simply to make it easier to line everything up when taking my exhaust system on and off. Also, my simple mind told me that I’d have fewer problems if things weren’t twisting against each other as they heat, cool, and torque twist around. The flex connectors were cheap enough to add in when I welded up my system.

    3. #3
      Join Date
      Feb 2019
      Location
      Kankakee IL
      Posts
      335
      NVH for factory cars also.

      They're not a terrible idea.
      Tracey

    4. #4
      Join Date
      Oct 2014
      Location
      DFW, Texas
      Posts
      422
      Country Flag: United States
      Along with the above they can also be used on exhaust systems with very tight clearances to the floor or body work. You can rigid mount the exhaust and put a flex pipe at the engine to accommodate movement.
      1972 Plymouth 'Cuda - Not LS-swapped, 5.7L Hemi [MS3 Gold Box], T56 Magnum 6-speed - 'Cuda Build Page
      1976 Dodge D100 - Warlock
      2016 Subaru WRX - E30 Tune

    5. #5
      Join Date
      Jul 2018
      Posts
      5
      Quote Originally Posted by GoodysGotaCuda View Post
      Along with the above they can also be used on exhaust systems with very tight clearances to the floor or body work. You can rigid mount the exhaust and put a flex pipe at the engine to accommodate movement.
      Sadly, I found out the hard way that I still had vibration when I rigid-mounted my system starting a couple of feet past the flex connector. Once I got rid of that mount all my vibration went away. I still have my tailpipes rigid-mounted with no problems.

    6. #6
      Join Date
      Feb 2011
      Location
      dallas, tx
      Posts
      1,715
      Country Flag: United States
      Allow for fine tuning exhaust routing, vibration doesn’t possibly break exhaust hangers, helps with movement if you bottom out some etc.

    7. #7
      Join Date
      May 2018
      Location
      way east on a rock
      Posts
      151
      Put a couple in for the same reasons
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    8. #8
      Join Date
      Aug 2004
      Posts
      140
      Where did you get those exhaust clamps sheltered Chevelle ??? They look great

    9. #9
      Join Date
      Oct 2004
      Location
      NJ
      Posts
      765
      Country Flag: United States
      Any recommendations on brand or design? I need to put them in now, I raised the trans to get better driveline angles, it is a bitch to get exhaust lined back up.

      thanks

    10. #10
      Join Date
      Sep 2010
      Location
      Martinez, CA
      Posts
      178
      Country Flag: United States
      These are great for NVH and heating/cooling changes but shouldn’t be used to correct mis-alignments. They need to be installed “centered”. They can only move so much in each direction so starting with a mis-alignment minimizes the remaining movement on that axis.
      Worlds Fastest LFX powered 1966 Chevelle, with a 3.6L/217 CI, 4 cam direct injected V6, 6 speed auto, full Hotchkis suspension, 4 wheel Wilwood discs, white w/red interior, cowl hood. 3260 lbs w/full tank. Built for 35 mpg. So far 32.

    11. #11
      Join Date
      Oct 2004
      Location
      NJ
      Posts
      765
      Country Flag: United States
      I didn't plan on using them like that. I will reposition the exhaust and add the flex, I figured I would add them now because I have to take out the strain, might as well add the flex.

    12. #12
      Join Date
      Sep 2005
      Location
      Chit-ca-go
      Posts
      438
      3 different higher end shops have tried to steer me away from using these. I still plan on using them when I can find a shop near me to do the work.
      1971 Firebird
      2017 Slipstream SS

    13. #13
      Join Date
      Oct 2007
      Posts
      1,838
      Quote Originally Posted by cpd004 View Post
      3 different higher end shops have tried to steer me away from using these. I still plan on using them when I can find a shop near me to do the work.
      agreed.. I went without.. even though the shop who welded the exhaust tried to convince me I needed them ..
      From a place you will not see comes a sound you will not hear....

      67 Camaro In progress

      https://www.pro-touring.com/showthre...-Tap-67-camaro

    14. #14
      Join Date
      Jun 2016
      Posts
      67
      It might be me imagining things but I get a really bad, almost exhaust leak sound, through mine.

      I am thinking about using that space for resonators.