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  1. #1

    Default 02 sensor holes on BBK H pipe

    so i switched to true duals on an 85.
    put a BBK H pipe on with no issues other than the 02 sensor holes.
    since its a carbed motor, no need for the sensors.

    what is needed to plug the holes?
    1985 Mercury Motorsport Capri Registry
    Official Pace Car of the Mercury Motor City 100 - Grand Prix IV

    www.Motorsportcapri.com

  2. #2
    FEP Power Member mcb82gt's Avatar
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    I just used some hex head brass plugs. Been so many years ago, I don't remember where I got them.
    Mike

    Now stang-less.

    88 Cougar 5.0

  3. #3

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    Hardware store should have those plugs
    79 Zephyr, 4.6L 4v/4r70w swap, with team z front and rear suspension, 8.8 and upgraded brakes and coil overs. Running Holley Terminator X Max.

  4. #4
    FEP Super Member bwguardian's Avatar
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    I have the BBK x-pipe on my 85...can't remember it's been too many years back, but I know you should be able to find something at the local hardware store...
    HAD
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  5. #5
    FEP Senior Member
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    Thread should be M18x1.5. If you search for o2 sensor plug you should come up with some results.

    https://www.amazon.com/Oxygen-Sensor...08J99GQCQKSXP9
    '89 XR-7 5 Speed
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  6. #6

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    This is what I used on my BBK long tubes. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
    1979 Mustang Indy 500 Pace Car
    Modified Mustangs Aug, 2006 Feature Car

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  7. #7

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    Get yourself an afr gauge and use one of those holes! I love having one in my car. I think it was 140 and included the wide range sensor. Great for trouble shooting, and in your case tuning the carb.
    1984.5 G.T.350 5.0 CFI AOD Convertible (TRX package, loaded)
    K&N filter in a stock dual snorkel, GT40 heads, Edelbrock 3721 intake, MSD 8456 Dist., MSD 8227 coil
    Comp cams XE254H, hypereutectic pistons
    Hooker Super Comp Shorty Equal Length Headers, catted BBK H-pipe, full custom duals
    Maximum Motorsports caster/camber plates and strut tower brace, 3.73 rear, dura grip (both Yukon)
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    AOD rebuilt with a 6 clutch direct drum, Koline steels stacked with 8 clutches, Kevlar band, superior shift kit, new torque converter. --Everything else stock and fully functional.

  8. #8
    FEP Senior Member
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    Oil pan plug.

  9. #9

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    Quote Originally Posted by KevinVarnes View Post
    Thread should be M18x1.5. If you search for o2 sensor plug you should come up with some results.

    https://www.amazon.com/Oxygen-Sensor...08J99GQCQKSXP9
    I assume stock h-pipe would want to obviously have the same thread pitch

  10. #10
    FEP Power Member mcb82gt's Avatar
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    Quote Originally Posted by Str8sixfan View Post
    I assume stock h-pipe would want to obviously have the same thread pitch
    I would assume this as well.
    Mike

    Now stang-less.

    88 Cougar 5.0

  11. #11
    FEP Power Member richpet's Avatar
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    Yup - m18-1.5.

    I got two at my local fastner store and cut them down.

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    83 5.0 GT. Quicker than it looks! 10:1 (or just over) 306, Motorsport a332 cam, 140A alt, t5 conv, 8.8 w/ 3.27's, Edel rpm, alum rad, very worked e7's, Holley SA carb, etc... SOLD IT!!!!

    Now an 1981 Granada! .040 over 302, Edel E-street heads... Currently building a 347 because, why not?

    "Never underestimate the power of stupid people in large groups"

  12. #12

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    The hex brass plugs always rattled in my car. Made me think a actual plug would need to be tapered like a NPT plug or something
    Theodore J. Garbera, 1985 Mercury Capri RS

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