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  1. #1
    New User Bison's Avatar
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    Jan 2017
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    Default Muffler orientation?

    I need to get some mufflers and stuff put under my '83 GT. Currently I am running long tube headers and glass-pack (PO) that dump about under the seats. I have tailpipes off a '86 GT that I want to use and am thinking of running Flowmaster super 44's. So my question is what orientation of the mufflers do I need, offset-offset, or offset-center. And how was the system routed from the factory, I have a feeling that it ran in the driveshaft tunnel and stuff.

    Also is there anything I need to look out for when putting the dual exhaust system under the car?

    Thanks in advance,

    Bison
    Foxes:
    1983 Mustang GT
    1988 Thunderbird Turbo Coupe
    Other Fords
    1955 F100 351W
    1998 Ranger

    "Pink isn't well, he stayed back at hotel."

  2. #2
    FEP Senior Member 83GTJIM's Avatar
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    Since the 83 was not equipped with dual exhaust from the factory you might need to be careful of the brake hose. Many people relocate it when running true dual exhaust.
    MCA #110307
    "Saved" 25k mi 83 GT - http://vb.foureyedpride.com/showthre...ght=Wrecked+GT
    83 GT T Top
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  3. #3
    FEP Member 83GLCoupe's Avatar
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    Google Images could be your friend here. Like this...Name:  Capture.JPG
Views: 125
Size:  89.6 KB


    And to answer your question, the mufflers are offset-offset and you will have to move rear brake hard line. The cars with true duals had the rear brake junction at the top of the rear diff whereas the early cars the junction was on the pass axle tube if I remember correctly.
    -1983 Mustang GL Coupe
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  4. #4

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    Definitely believe your mufflers should be allowed to have whatever orientation that makes them happy.
    Cheers,
    Jeff Cook

    '85 GT Hatch, 5-speed T-Top, Eibachs, Konis, & ARE 5-Spokes ... '85 GT Vert, CFI/AOD, all factory...
    '79 Fairmont StaWag, 5.0, 62K original miles ... '04 Azure Blue 40th Anny Mach 1, 37K original miles...
    65 coupe, 289 auto, Pony interior ... '67 coupe 6-cyl 4-speed ... '68 Vert, Mexican block 307 4-speed...
    '71 Datsun 510 ... And a 1-of-328 Deep Blue Pearl 2003 Marauder 4.6 DOHC, J-Mod, 4.10s and Lidio tune

  5. #5

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    I thought they were center to outside offset. Guess I was wrong.
    2 1986 cougars (both 4 eyed and 5.0)
    1 1987 cougar

  6. #6

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    Quote Originally Posted by 83GTJIM View Post
    Since the 83 was not equipped with dual exhaust from the factory you might need to be careful of the brake hose. Many people relocate it when running true dual exhaust.
    Add to that, now that Latemodel is selling a reproduction chassis bracket/banjo fitting assembly, there's no need
    to go scrounging around the boneyards for one (unless you like that sort of thing).
    Cheers,
    Jeff Cook

    '85 GT Hatch, 5-speed T-Top, Eibachs, Konis, & ARE 5-Spokes ... '85 GT Vert, CFI/AOD, all factory...
    '79 Fairmont StaWag, 5.0, 62K original miles ... '04 Azure Blue 40th Anny Mach 1, 37K original miles...
    65 coupe, 289 auto, Pony interior ... '67 coupe 6-cyl 4-speed ... '68 Vert, Mexican block 307 4-speed...
    '71 Datsun 510 ... And a 1-of-328 Deep Blue Pearl 2003 Marauder 4.6 DOHC, J-Mod, 4.10s and Lidio tune

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