What is the diameter of the exhaust pipe? - Page 2
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2008-2013 Cadillac CTS Performance Mods Discussion, What is the diameter of the exhaust pipe? in Cadillac CTS Second Generation Forum - 2008-2013; Thanks for your help. Got a little lost learning about your pipe and tube ordering, but I think I get ...
  1. #16
    arachnyd is offline Cadillac Owners Member
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    Re: What is the diameter of the exhaust pipe?

    Thanks for your help. Got a little lost learning about your pipe and tube ordering, but I think I get the relation to exhaust!

    So I went ahead and ordered 2 1/4" cutouts, which should be 2 1/4" ID because its TUBING. I then bought 2 fittings that are 2 1/8" because they are 2 1/8" ID and 2 1/4" OD. That slip over the 2 1/8" OD, 2" ID Exhaust pipes on the Cadillac. Now I know they may not fit perfectly, but I'm hoping for it. I'm going to go ahead and clamp them for the short term and then try welding themwhen I can get under easier than jackstands.

    I'll be sure to keep your tips in mind also next time one of our builders tries to sell us hexagonal poultry netting.

  2. #17
    CTSCHICK is offline Cadillac Owners Connoisseur
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    Re: What is the diameter of the exhaust pipe?

    Cool
    You doing electric cut out valves?
    You are going to end up wanting turn downs on those cutouts hehe

  3. #18
    conedoctor is offline Cadillac Owners Connoisseur
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    Re: What is the diameter of the exhaust pipe?

    I bet those cut outs are billet aircraft aluminum too lol

    Let us know how it works.

  4. #19
    arachnyd is offline Cadillac Owners Member
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    Re: What is the diameter of the exhaust pipe?

    Cutouts finally came today. Hoping to get it done this weekend, but its tough to find the time during football season! haha. I don't want to wait until its too cold though. I'm mounting them right behind the mufflers. I'm going to clamp them on at first and then go back and weld them. I did get turn downs also. We'll see how it goes... will report back with pictures and video.

  5. #20
    arachnyd is offline Cadillac Owners Member
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    Re: What is the diameter of the exhaust pipe?

    OK so I was having trouble sawing it and tried to take it to a shop. The shop said "We can't weld stainless to non-stainless, and we can't use clamps". This is after they had it two days. What??? stupid. Now I have a giant exhaust leak because I half-sawed off an exhaust pipe.

  6. #21
    conedoctor is offline Cadillac Owners Connoisseur
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    Re: What is the diameter of the exhaust pipe?

    Take it to another shop.

  7. #22
    tinman's Avatar
    tinman is offline Cadillac Owners Connoisseur
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    Re: What is the diameter of the exhaust pipe?

    Call the shop and tell them exactly what you are looking for. If it is off the car take it to a metal fabricator who does stainless steel.

  8. #23
    arachnyd is offline Cadillac Owners Member
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    Re: What is the diameter of the exhaust pipe?

    Two months later and I finally have it done... frankly, it sounds incredible. The words of the guy who did it at the performance shop said "It sounds like a pissed off M3".

    Its hard to get a good sound recording, but here's what I can tell you. Its not obnoxiously loud, but its loud enough to let those around you know whats up. Its quiet enough that I'm probably going to leave them open all the time. There is no raspiness, rattle, or otherwise common with many V6s and pretty much all I4s. Any raspiness you hear is because its exceeding the limits of my cell phone microphone. While I've driven less than 5 miles with it so far, I've already been told "thats a V6? sounds like a d*mn V8"

    So take from it what you will, and watch the video, but I must say I am 100% pleased


  9. #24
    andrewhuynh1995's Avatar
    andrewhuynh1995 is offline Cadillac Owners Member
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    That sounds absolutely mind blowing! Nice job!

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