Custom mid-pipe question
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This is a discussion on Custom mid-pipe question within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; I currently have a NP 5" muffler axle back for my 2011 WRX sedan. I'm looking to get the NP ...

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    Registered User younoleit's Avatar
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    Custom mid-pipe question

    I currently have a NP 5" muffler axle back for my 2011 WRX sedan. I'm looking to get the NP down-pipe as well, which is 3" in diameter. From there I'd like to get a mid/y-pipe, but IMO 600$ is way too much for to pay for it. Have a friend with a shop who has offered to make me one with SS. Would getting the NP DP -> custom mid/Y -> NP axle back be a good set up? Does anyone have this? I was thinking of putting in a resonator in the mid to help tone it out with the expansion to 3"

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    OMG WTF MainFrame's Avatar
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    Sounds like a good plan to me. I'm planning on having a custom midpipe made with a resonator in it to go with my rotated downpipe so I can sell my TurboXS midpipe along with the TurboXS downpipe I have.

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    Registered User younoleit's Avatar
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    Quote Originally Posted by MainFrame View Post
    Sounds like a good plan to me. I'm planning on having a custom midpipe made with a resonator in it to go with my rotated downpipe so I can sell my TurboXS midpipe along with the TurboXS downpipe I have.
    Was your mid 3"? How did it sound in comparison to stock?

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    OMG WTF MainFrame's Avatar
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    I can't say about just the midpipe alone, I originally installed my 3" midpipe along with the 4" bellmouth downpipe. It had considerably more rumble compared to stock on the same muffler, although I'm sure going from the stock three catalytic converters to completely catless was also a big factor in the sound change.

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    Master Baiter EJ257's Avatar
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    Sure, why not? The midpipe really isn't something that needs to be R&D spec to get the most power out of it.

    In terms of resonators, depending on how much straight piping you have, there are a few options available on the Vibrant Performance site for bottle resonators:
    Vibrant Performance ::.

    I've debated adding one to my XR-1 catback, but will likely just give it back to my buddy when I buy a Q300.
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    OMG WTF MainFrame's Avatar
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    Summit Racing is also a good source for various generic resonators.

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    Registered User younoleit's Avatar
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    Quote Originally Posted by EJ257 View Post
    Sure, why not? The midpipe really isn't something that needs to be R&D spec to get the most power out of it.

    In terms of resonators, depending on how much straight piping you have, there are a few options available on the Vibrant Performance site for bottle resonators:
    Vibrant Performance ::.

    I've debated adding one to my XR-1 catback, but will likely just give it back to my buddy when I buy a Q300.
    That was my thought. No need to spend crazy money on it. I can get it made with flanges so it is removable right?

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    Registered User plasmarex12's Avatar
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    im doing mine hopefully in 2 weeks. cobb dp and nameless axleback. my buddy is doing it at his shop for 250 with flanges so it removable. im going with no resonator...
    boost is like alcohol, its fun and great in moderation, to much and something's gonna go boom.

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    Registered User younoleit's Avatar
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    Quote Originally Posted by plasmarex12 View Post
    im doing mine hopefully in 2 weeks. cobb dp and nameless axleback. my buddy is doing it at his shop for 250 with flanges so it removable. im going with no resonator...
    I'd really appreciate it if you let me know how it sounds. I'm curious as to how it will sound going from 2.25" -> 3" then that will help me decide on the resonator.

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    Registered User plasmarex12's Avatar
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    will do just waiting on my tax return
    boost is like alcohol, its fun and great in moderation, to much and something's gonna go boom.

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    Registered User younoleit's Avatar
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    Quote Originally Posted by plasmarex12 View Post
    will do just waiting on my tax return
    Same. Although at the moment I'm getting an Escort ZR4 Laser Shifter. I was a holiday worker at Best Buy and have employee discount for one more week, so I have to take advantage of it.

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    Registered User plasmarex12's Avatar
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    well cancel that, might be a while. my grage door springs broke and the opener broke so there goes that money... spending the rest of my return going tp stage 3
    boost is like alcohol, its fun and great in moderation, to much and something's gonna go boom.

  14. #13
    Registered User younoleit's Avatar
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    OK, another question - same topic. Still no DP, but getting the mid-pipe. What do I need to connect my current DP (stock) to my custom mid (3") that is soon to be made?

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