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Interesting Exhaust idea: best of both worlds?

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  • Interesting Exhaust idea: best of both worlds?

    I've been looking around and reading about exhaust setups as I'm looking to redo mine this spring. As far as I know NY requires a cat and tests for it but honestly I don't want one. So I was thinking of getting a cat that is flanged on both ends and flanging the exhaust piping. And also having a straight piece of pipe flanged on both ends. The idea being, run the straight pipe normally and swap in the cat via the bolted flanges when it was inspection time or if you get in trouble. This might be a good idea for some of the CA guys. Thoughts?

    Carson
    sigpic
    ~ Remember the Past, Embrace the Future, and always live life In This Moment

  • #2
    I don't think there are any CA guys lol. What is your reasoning for not wanting a cat?
    Got a new baby <img src="{SMILIES_PATH}/smile.gif" alt="" title="Smile" /> - 2006 Ion Redline Stage 2<br /><br />Old baby :<br />--My ride : http&#58;//www&#46;cardomain&#46;com/ride/405827

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    • #3
      Why don't you want one?
      -2002 Saturn SC2 - Clean, slow, low daily
      -2008 Saab 9-7x Aero
      -1996 Suzuki Bandit 750 swapped
      -1998 VW Golf GTI VR6 Mid Engine LeMons car
      -1986 RX7 - 275whp @ 10psi

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      • #4
        First off, I'd use exhaust clamps if I wanted to do this.

        Secondly, Cats have come a LONG way and are now not very restrictive, and VERY good for the environment and people behind you. Just find a "high flow" one.
        - Justin [s]99 Blue SL2 - T3/T4 14psi[/s] (dead)


        FS: Pimped lower trans mount, TiAL 38mm Wastegate, Gauge Cluster, Oil Drain

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        • #5
          Flow and tone mostly. I'm NA now and will most likely be nitrous by fall. My thinking was just to get a cheap cat to pass inspection, but loose the restriction afterwards and go to the straight pipe. Though now I'm not sure if its worth it. Yes no?

          Carson

          PS Mind numbingly boring college classes make you think strange things.
          sigpic
          ~ Remember the Past, Embrace the Future, and always live life In This Moment

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          • #6
            It's not worth it. Your exhaust will sound better WITH a cat than without. It will also be cleaner and you won't ever have to worry about getting a fix-it ticket.

            Even running nitrous, it won't be much of a restriction if at all.

            Just get 2.25" mandrel bent, and you'll be fine.
            - Justin [s]99 Blue SL2 - T3/T4 14psi[/s] (dead)


            FS: Pimped lower trans mount, TiAL 38mm Wastegate, Gauge Cluster, Oil Drain

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            • #7
              Many many moons ago I used to do that same exact set up. This was done on multable vehicles. (late 80's early 90's) But with the new high flow cats its now unneeded.

              Tim
              Collecting parts soon bitches soon........

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              • #8
                That works then, High-flow cat it is.

                Carson
                sigpic
                ~ Remember the Past, Embrace the Future, and always live life In This Moment

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                • #9
                  Originally posted by LonehunterKU
                  Yes no?

                  PS Mind numbingly boring college classes make you think strange things.
                  No.

                  Thats what you get for going to KU.
                  ilostmysocketwrench | Bentra Motorsports Blog | Bentra Motorsports Videos

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                  • #10
                    I don't have a cat, and I run nitrous. most of us who do removed ours because you want as much flow on the exhaust side as you can get, BUT many of us don't have emissions either in our states. but if you were wondering if it would help under spray, yep, sure does.

                    your idea has been done before, I say go for it, but it might be more simple to just go with a high-flow unit instead of all that hassle back and forth.
                    -Vinny

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                    • #11
                      although those people who run a MS or other standalone... if you have a spark cut rev limiter (of launch control or flatshift) you CANNOT run a cat. youre basically dumping raw fuel into the exhaust, which will ignite in the pipe (shooting cool flames BTW) and blow out your cat.

                      just a sidenote....

                      oh and rather than bolted flanges or even exhaust clamps... get V-band flanges and clamps. those things are wonderful... no gaskets, and you can change out the pipe in like 3 minutes.


                      Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut. -Ernest Hemingway

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                      • #12
                        Originally posted by ExHempKnight
                        oh and rather than bolted flanges or even exhaust clamps... get V-band flanges and clamps. those things are wonderful... no gaskets, and you can change out the pipe in like 3 minutes.
                        +1!!!!
                        <br /><br />I wont bow to something that I've never seen..........I can't believe in something that doesn't believe in me....I'm not blood of your blood.....I'm no son of your god...I'm have no faith in your faith, still I find salvation<br /><br />[quote author="omgitselvisc"]im vinny's bitch i guess lol[/quote]

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                        • #13
                          LonehunterKU, You're in Flint for now.... I know you live in NY originally... but how often do you ever really visit there?

                          It's cheaper right now to just get it straight-piped like you want, and later, get a Catco hi-flow cat and have it flanged like you want. We don't have emissions laws here in Flint, and don't require catalytic converters on your car if it isn't done in a shop.

                          But, it's your car, it's your call.


                          -Shane

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                          • #14
                            I switch between the two every three months because of school and i only have a year left and then I'll be back in NY for good. Still not completely sure on which way I'm going to go . I'll have to price it out I guess to decide for sure.

                            Carson
                            sigpic
                            ~ Remember the Past, Embrace the Future, and always live life In This Moment

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                            • #15
                              if you are stuck on doing it just weld in an electric cutout (i have one for sale) before the cat and you will be goldenish.

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