Dual Exhaust Conversion
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500, 472, 425, 368 Discussion, Dual Exhaust Conversion in Cadillac Engine Technical Discussion; Just got a '75 Eldo. Conv. w/ 500 -stock single exhaust. Can anyone offer suggestions to convert to dual? I'd ...
  1. #1
    Erik D. is offline Cadillac Owners Member
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    Question Dual Exhaust Conversion

    Just got a '75 Eldo. Conv. w/ 500 -stock single exhaust. Can anyone offer suggestions to convert to dual? I'd like to keep it under $600 & would do one muffler (Edelbrock, Turbo, Flowmaster, etc.) w/ two 2.5'' exits, or true dual w/ two mufflers depending on cost. A friend may do the work & "could" eliminate the catalytic converter -anything to change/alter in the emissions if that is gone? Thanks in advance.
    -Erik

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  3. #2
    Starwind is offline Cadillac Owners Member
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    Re: Dual Exhaust Conversion

    When I do exhaust on my 76 DeVille I am going with a true dual setup. Cats are gonna get thrown in the trash. Still have not decided on mufflers. I don't want the car loud while cruising but I would like to hear to 500 while I have the go pedal mashed.

    Anyone every put an H-pipe on these cars? Hopefully there is room.

    I would get the true dual if the price is right.

  4. #3
    German_472's Avatar
    German_472 is offline Cadillac Owners Member
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    Re: Dual Exhaust Conversion

    Hi,
    MTS has a new product, which is a complete dual exhaust system for a 1971 to 1977 Eldorado (without provision for the converters, which I guess you are scrapping anyways). Estimated price is 400 USD - but right now, its a prototype and I have a picture in his catalog, it looks very good. Maybe give Al a call (262 740 1118)

    Andreas

  5. #4
    Starwind is offline Cadillac Owners Member
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    Re: Dual Exhaust Conversion

    My buddy has his own shop complete with a mandrel bender. Shoud not be too hard to fab it up on a Friday evening. I hope.

  6. #5
    MMNineInchNails's Avatar
    MMNineInchNails is offline Cadillac Owners Enthusiast
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    Re: Dual Exhaust Conversion

    When I get mine done, my friend is making me headers, and i'll have 3" pipes to two glasspacks and chrome tips going out the sides just in front of the rear wheels.

  7. #6
    Dead Sled's Avatar
    Dead Sled is offline Cadillac Owners Connoisseur
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    Re: Dual Exhaust Conversion

    Most muffler shops will do custom duals how ever you want it. bigest price is the mufflers. I was under 600 with 2 1/2" pipe with cut-outs , 2 dynomax's and X-pipe

  8. #7
    Starwind is offline Cadillac Owners Member
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    Re: Dual Exhaust Conversion

    How do the Dynomaxs sound, idle, cruising, WOT? Any drone with the system?

  9. #8
    davesdeville's Avatar
    davesdeville is offline Banned
    Automobile(s): 1995 ETC, 75 Deville, Cad500 powered 73 Apollo, 94 Mark VIII
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    Re: Dual Exhaust Conversion

    My friend says he's getting a tubing bender... so I might be getting dual exhaust soon. I plan on 3" pipe, no gatopower (cats), and either one of those mufflers that you can switch between a muffler and a straight pipe, or just 2 cherry bombs (glasspacks).

    Or I could just run two cherry bombs off the headers and see how that works out..

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