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    #1

    Exhaust question

    I have been putting new manifolds on my 85 CV to allow for the second o2 sensor for the SEFI swap, in the process I am going to do a whole new exhaust system. The car had the single exhaust with the Y pipe stock, and I am upgrading to duals while I'm at it. Currently I have the 'new' manifolds bolted on (1990 Lincoln manifolds) and that's it. I am getting some downpipes made at a local shop (no cats). So I'm waiting on that to continue farther.

    I plan to go with straight pipes all the way to the axle and if I get some pipe to go over the axle I'll go to the bumper.

    Eventually I will get some mustang or Mark 7 headers instead of the lincoln logs. If it's worth it.

    My question is, will be there any noticeable difference between '90 TC manifolds and Mustang Headers?

    And if I choose to get the headers, are they any longer than the TC manifolds? would I need new Downpipes?

    Thanks as always!
    1985 LTD Crown Victoria - Currently restoring after she caught fire! CFI to SEFI to Carb swap, all custom wiring, Duraspark 2 ignition, Motorcraft 2100 Carb, slicktop, Shorty headers dumped before rear axle, 140 Speedo, 3G alt, And currently building an engine for her.

    2000 Lincoln Town Car Signature Series - 165XXX, PI intake swap , 30 MPG Easy on the Highway, All options except dual exhaust. Currently looking for 2 front seats: Heated, Memory, and Light Graphite color!!
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    #2
    Yes, and yes, you'd need to at the very least modify the bell flange on the downpipes.
    2020 F250 - 7.3 4x4 CCSB STX 3.55's - BAKFlip MX4
    2005 Grand Marquis GS - Marauder sway bars, Marauder exhaust, KYB's
    2003 Marauder - Trilogy # 8, JLT, kooks, 2.5" exhaust, 4.10's/31 spline, widened rear's, metco's, addco's, ridetech's 415hp/381tq
    1987 Colony Park - 03+ frame swap, blown Gen II Coyote, 6R80, ridetechs, stainless works, absolute money pit. WIP

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      #3
      I forgot till just now, but i think i read the headers are 2.5" anyways and mine are 2" so it's pretty obvious they would need changed. Wasn't thinking about diameter
      1985 LTD Crown Victoria - Currently restoring after she caught fire! CFI to SEFI to Carb swap, all custom wiring, Duraspark 2 ignition, Motorcraft 2100 Carb, slicktop, Shorty headers dumped before rear axle, 140 Speedo, 3G alt, And currently building an engine for her.

      2000 Lincoln Town Car Signature Series - 165XXX, PI intake swap , 30 MPG Easy on the Highway, All options except dual exhaust. Currently looking for 2 front seats: Heated, Memory, and Light Graphite color!!

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