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M20 - Cat. Delete + Exhaust?

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    M20 - Cat. Delete + Exhaust?

    My catalytic converter has something broken inside it. I'm thinking about just taking it out and running a Y-pipe. The car's got a Scorpion on it now.

    Has anyone run a cat-back exhaust with deleted cat.? Hows it sound? Any sound clips?

    While I'm at it, does anyone know the dimensions of the inlet / outlet pipes off hand? I'm going to get under the car tonight but I'm trying to find a Y-Pipe asap.
    Last edited by Moto-Mucci; 10-22-2009, 10:08 AM.

    #2
    YouTube has a ton of these. Also with glass packs to tone it down since I heard it can get annoying at times. I've pondered this idea as well.
    M Coupe

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      #3
      Originally posted by Eric Devier View Post
      YouTube has a ton of these.
      I wasn't able to find any M20's with a scorpion and cat delete

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        #4
        hargte catback + no cat from the factory
        Build Threads:
        Pamela/Bella/Betty/325ix/5-Lug Seta/S60R/Miata ITB/Miata Turbo/Miata VVT/951/325xi-6

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          #5
          Back in '07, I ran my car with Supersprint(reps) headers, no cat, and a magnaflow 14815. It was pretty borderline (loud) for the street, but damn it sounded awesome at WOT.

          Rippin' Proper | Youtube | Vimeo |

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            #6
            I run my 318is without a cat. At first with just a small magnaflow 11365 and no stock resonator. LOUD AS BALLS and raspy as shit. Added an 18in resonator and now it sounds great. Not an m20 I know, but it's food for thought.

            S54B32 swap in progress. Status: Getting There

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              #7


              Jah bless! :pimp:

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                #8


                Bavauto headers, midpipe, remus exhaust

                engine is a 2.8l m20

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                  #9
                  ^ still my favorite car on this forum.

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                    #10
                    Edit - both those first videos are pretty close to what my setup would be. Red car sounds raspy - is he on here? I wonder if his muffler 'broke in' and sounds better.

                    1st white car sounds good.

                    2nd white car does too but that's not very close to my setup. Different motor + headers.

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                      #11
                      Just picked the car up and I couldn't be happier.

                      Up to 3500 it sounds about the same - good mild note. After 3500 it roars a real nice deep hollow howl. Burbles and back fires on downshifts even more - which I love. At WOT it sounds great.

                      Throttle response feels better, and it even cured my up and down idle. She sits smooth at 700 now.

                      I still haven't gotten the car up to see the work done or taken any video/pics since it's raining. Maybe tomorrow if it's nicer out.

                      For $80 fabbed up and installed!

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                        #12
                        at some point you may want to put a resonator in place of the cat. i ran mine with straight pipes for the cat delete and it got old. i added a magna flow as a resonator and could not be happier.

                        it is on a 2.7 stroker, Dbilas. cold air, stromg catback, msds shorties, 292 cam.

                        the resonator made it a lot quieter inside the car with the windows rolled up.
                        seien Sie größer, als Sie erscheinen


                        Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

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                          #13
                          Originally posted by Julien View Post
                          hargte catback + no cat from the factory
                          Originally posted by James Crivellone View Post


                          Bavauto headers, midpipe, remus exhaust

                          engine is a 2.8l m20
                          I like both of these.
                          Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

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                            #14
                            Originally posted by Mucci View Post
                            For $80 fabbed up and installed!
                            where did you go get this done?

                            most places won't remove cats cause of some liability thing or so ive been told...

                            Originally posted by Slangbox
                            Pretty sure if you removed the lights and plates, you'd disappear at night. Rockin' it Batman style--I like it.

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                              #15
                              I don't know! Some of theme sound too much like a Honduh!


                              Simplicity is your best option!

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