W4M Full Exhaust Mod
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2009-2014 Cadillac CTS-V Performance Mods Discussion, W4M Full Exhaust Mod in Cadillac CTS-V Series Forum - 2009-2014; For the people that purchased W4M full exhaust and found it to be to loud, i found a fix for ...
  1. #1
    qictrk's Avatar
    qictrk is offline Cadillac Owners Enthusiast
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    W4M Full Exhaust Mod

    For the people that purchased W4M full exhaust and found it to be to loud, i found a fix for about $50. You have to cut off the stock mufflers and put it on Jesses system. When you want, you can go back to stock. I made this change and it is almost stock sounding. I got these items from Summit. 2 1/2" clamps(2) Sum-G4625, 3" clamps(2) Sum-G4630(2), SST Strap Band WLK-33240(2) You can do without Strap and use the ones from Jesses kit, i just wanted a spare set, Reducer WLK-41973(2).
    Picture 1 :http://rides.webshots.com/photo/2336...32470346CFfsZH
    This if part of what i got.
    Picture 2 :http://rides.webshots.com/photo/2632...32470346tRnsuQ
    Make a cut on both pipes 4 1/2".
    Picture 3 :http://rides.webshots.com/photo/2168...32470346YtOkOJ
    This show the weld.
    Picture 4 :http://rides.webshots.com/photo/2688...32470346BYSknA
    You cut off the stock muffler 4 1/2" from curve.
    Picture 5 :http://rides.webshots.com/photo/2294...32470346lEucNc
    Shows what it looks like hooked up.
    Picture 6 :http://rides.webshots.com/photo/2134...32470346gGunmn
    Missing the 2 1/2" clamp.
    Picture 7 :http://rides.webshots.com/photo/2328...32470346FuHAOS
    Last picture.
    I can't say that my 4 1/2" cuts will work on yours for sure because of the varance in weld spots etc. You do have some play, so it should work but i give no guarantee. I am not a mechanic.
    You can go back to stock at anytime by using the sst clamps. DO NOT cut off any extra pipe of the stock system.
    If your still not sure what i'm doing, you can email me with your phone # and i will give you a call. I'm not the best at putting into works whats in my head. Cecil.........

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  3. #2
    RapidRob's Avatar
    RapidRob is offline Cadillac Owners Connoisseur
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    Re: W4M Full Exhaust Mod

    ^^ Hmm - if I'm not mistaken, I think that's the same as one of Jesse's optional systems, where he offers a 3" exhaust from the cats back to the OEM mufflers through a stainless X-pipe. I purchased that from him but haven't installed it yet. How does it sound ?

    Rob

  4. #3
    qictrk's Avatar
    qictrk is offline Cadillac Owners Enthusiast
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    Thread Starter

    Re: W4M Full Exhaust Mod

    Quote Originally Posted by RapidRob View Post
    ^^ Hmm - if I'm not mistaken, I think that's the same as one of Jesse's optional systems, where he offers a 3" exhaust from the cats back to the OEM mufflers through a stainless X-pipe. I purchased that from him but haven't installed it yet. How does it sound ?

    Rob
    Its the same one except i didn't get the one he offered useing the OEM mufflers. This is for people, like me, that got the full lenght system with no mufflers. It was to loud, so this is why i had to cut his down and go the route i did. It sound great now. I think you'll like them. Cecil.........

  5. #4
    RapidRob's Avatar
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    Re: W4M Full Exhaust Mod

    ^^ Thanks - good to hear!

    Rob

  6. #5
    musclesbmf is offline Cadillac Owners Connoisseur
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    Re: W4M Full Exhaust Mod

    Well, I too modified my full 3" exhaust. I put on magnaflow round mufflers and the sound is just about perfect. Changes the tone and subdues it just enough. It was quite a job, but my friend has a mufflershop and we did it out there. unfortunately the mufflers were not a direct replacement as they were too long, but we made it work and it is really weet now.

    Mark

  7. #6
    brent eb02's Avatar
    brent eb02 is offline Cadillac Owners Fanatic
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    Re: W4M Full Exhaust Mod

    mark
    would you mind taking a couple pics for us and which mufflers you used....i need to quiet my car down too...
    thanks

  8. #7
    wait4me's Avatar
    wait4me is offline Cadillac Owners Connoisseur
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    Re: W4M Full Exhaust Mod

    the bassani race mufflers work well. you can place them even at the gas tanks and the fit.

  9. #8
    musclesbmf is offline Cadillac Owners Connoisseur
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    Re: W4M Full Exhaust Mod

    I try to get some pics this weekend. Sounds like the bassani might have a better fit. I know mine are the 6" round magnaflows with 3" inlets. The sound is perfect for me.

    Mark

  10. #9
    wait4me's Avatar
    wait4me is offline Cadillac Owners Connoisseur
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    Re: W4M Full Exhaust Mod

    Bassani are very narrow, kinda oval shapped. I think 4 inch by 6.

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