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Projects Exhaust flex pipe

Discussion in 'The Hokey Ass Message Board' started by 6-bangertim, Sep 2, 2017.

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  1. 6-bangertim
    Joined: Oct 3, 2011
    Posts: 408

    6-bangertim
    Member
    from California

    How long has flex pipe been around? Is it considered 'period correct' for a late-50's - early-60's build?

    The PO used a low-bidder muffler shop to connect the 2-1/2" rams-horn manifolds to the 2" glass-packs on back on my '57 Chevy. Never been real happy with the look, thinking about a DYI upgrade with flex pipe, then moving the mufflers back several inches to install cable-style cutouts. Since the car is a Black Widow tribute, I want to move the mufflers and pipes inbord for room for a second set of pipes exiting out in front of the rear wheels. I'll use a hole saw to cut the frame B-W style.

    The car is NOT numbers-matching, never will be. But, whatever upgrades I make WILL be perriod correct! Thanks, Tim
     
  2. low budget
    Joined: Nov 15, 2006
    Posts: 5,566

    low budget
    Member
    from Central Ky

    Flex pipe is just a band aid in my opinion, If its on something nice, I would do it rite. I wouldnt cut any holes in the frame either..............flex pipe and holes in the frame sounds like two different extremes to me, one cheap and one high end if done correctly.
     
  3. AldeanFan
    Joined: Dec 12, 2014
    Posts: 894

    AldeanFan

    I would just find a good muffler shop and have it done right,
    Never have seen a diy exhaust that looked good


    Sent from my iPhone using Tapatalk
     
  4. Auburn had flex pipe
    Auburn-Eight-Supercharged-Speedster.jpg
     
    31hotrodguy likes this.

  5. 302GMC
    Joined: Dec 15, 2005
    Posts: 7,908

    302GMC
    Member
    from Idaho

    ^^^^
    Not really - that's a bright metal shield for appearance. The tubing is inside.
    When 14 or 15, flex pipe helped a lot of kids get dual pipes on their first car. Their second car probably didn't.
    It was illegal in most states, as well.
     
  6. CME1
    Joined: Aug 10, 2010
    Posts: 305

    CME1
    Member

    I used flex pipe on a few car's back in my early Hi School day's. Like said before, it was a temp fix, didn't really last long. But it was really easy to use on the 'ol dual exhaust systems. And cheep! Did use a lot of muffler clamps. But that was the '50's and we did what we could afford.
     
    TagMan likes this.
  7. sunbeam
    Joined: Oct 22, 2010
    Posts: 6,220

    sunbeam
    Member

    1956 Lincoln continentals used stainless flex pipe between the manifolds and the tail pipe.
     
  8. Toymont
    Joined: Jan 4, 2005
    Posts: 1,381

    Toymont
    Member
    from Montana

    I used flex to connect my headers to the original exhaust until I could get a new system. seemed like every time I went over a speed bump or hit a pot hole it would slip back and then I had to crawl under and jam it back on. A temporary fix for sure.
     
  9. I installed some of this stuff on a gen-set, and found it would leak slightly along its length, at the seams. I dont know if it was because it was cheap junk, or that it was typical for this stuff. Probably doesn't make much difference, as it is all mounted externally.
     
  10. TagMan
    Joined: Dec 12, 2002
    Posts: 6,300

    TagMan
    ALLIANCE MEMBER

    Flexible exhaust pipe works great for mocking up a custom exhaust system - not so good for a permanent installation.
     
  11. Go with stainless steel flex, never rotts.

    I am running 2" stainless steel flex and 2" dairy pipeline as tailpipes.
    It was free and I am welder by trade.


    Many oval tracks rulebooks mandated flex pipe in the exhaust system, because it required the exhaust to be bolt up instead of people just letting it hang from the headers and falling off.
     
  12. drtrcrV-8
    Joined: Jan 6, 2013
    Posts: 1,711

    drtrcrV-8
    Member

    Sunbeam : The '52-'57 Lincolns DID NOT use Flex pipe for exhaust pipes : it was used for exhaust pipe HEAT SHIELDS/COVERS. I had it originally on my dads '54, & on my '52 & '53, & I've also seen it on '56-'57 Continentals!
     
  13. David Gersic
    Joined: Feb 15, 2015
    Posts: 2,734

    David Gersic
    Member
    from DeKalb, IL

    I keep a 5' piece of flex in my garage for when I need to run a car inside in the winter. Unheated garage, and the weather sucks outside. Raise the door a couple of inches, run the flex outside, and there's a lot less danger of CO poisoning.

    Wouldn't use it on a car, though. Traditional emergency exhaust repairs with beer cans and hose clamps, yeah, I've done those a few times, but that's because I couldn't afford anything better.

    The modern exhaust flex coupling between the engine and pipes might make sense to use if you're breaking things, maybe.


    Sent from my iPad using H.A.M.B.
     
  14. May 1953 Hot Rod Flexpipe headers and fuel injunction.
    Cheap and high end together is period correct as well.:)
    [​IMG]
     
    Last edited: Sep 3, 2017

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