Do all down pipes crack ?
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Thread: Do all down pipes crack ?

  1. #1
    Join Date
    Jun 2019
    Failing a car near you....

    Do all down pipes crack ?

    Ive read that every single aftermarket down pipe will crack at some point,even if you have an upgraded RMM installed.

    Ive also read that the Ktuned pipe is the best because of the 2 piece design,but it still leaks at the flange, eventually.

    Is any of this true? Anyone have a DP longer than 3 years with no issues?

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  3. #2
    Join Date
    Apr 2015
    Chesapeake, VA
    I would say that might be true. I've had the Full Race Gen 1 DP for over 3 years now. I'd say after the first few months I had to ship it back to get it re-welded at the flange which had developed a crack running along the top of the weld and part way down both sides. I wouldn't be surprised if it has since cracked again,pretty sure it is, but I don't have the patience to deal with it. Any of the casted flanges look like they would hold up much better.
    K24Z7 Crew Member #401

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  4. #3
    Big Timer!!! homegrown's Avatar
    Join Date
    Feb 2017
    The big problem is that none of the aftermarket downpipes have the lower attachment point like the stock one does, so it puts a lot of stress on any of the welded joints. Without that additional attachment point, they will all fail eventually.

    Sent from my iPhone using Tapatalk

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  6. #4
    Super Mod's Pet RujoKinJal's Avatar
    Join Date
    Jan 2016
    North Adams, Mass 01247
    I purchased my RV-6 DP from a member. used with 1k miles onit. i have put around 40k miles on my car. NE winters since 2016.
    RMM and upper Torque mount. No cracks yet.
    9th Gen Civic POP Crew #88

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  7. #5
    Big Timer!!! 9thgensifamily's Avatar
    Join Date
    Apr 2015
    I used the RV6 downpipe for 4 years, lots of miles the last year. I also live in the rust belt...never had a issue with the downpipe with everything else stock. No after market engine mounts or anything.
    I believed alot of issues was not having a flex joint on the downpipe, or too small of a flex joint. I had the subframe off during clutch change, and the stock motor mounts are very soft...I can see how the engine could flex and break the downpipe.

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