Removing Cats -iScrape

Discussion in 'General Tech' started by 5-oh-MUSTANG, May 14, 2014.

  1. 5-oh-MUSTANG

    5-oh-MUSTANG Well-Known Member

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    Ok this is my second aftermarket mid pipe Im on now. I previously had a 2 cat mid pipe that was ruined because the cat was destroyed by speed bumps. I just replaced that with the current Magnaflow 4 catted mid pipe i believe. The top pre cats are fine but the two in the middle scrape big speed bumps and one cat is ruined. Its now making a rattling noise. Now my question is can i keep the two pre cats on the top and remove the middle two with piping or gut them? Would it not pass emissions with the top two? Any insight? Oh btw i have like 2 inches of clearance with the midpipe.
     
  2. B.mad

    B.mad Well-Known Member Preferred Vendor

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    welll it depends on where youre at. In California, theres a chance you might pass with keeping 2 cats, however the visual wont. Also depends on the mods you have. I have an o/r h pipe so i wont pass at all.
     
  3. CC'S95GT

    CC'S95GT Legend

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    You won't pass the visual without cats but if you pull the spout connector for the test I would almost guarantee you'll pass the sniffer.

    Are you installing the midpipe youself or is a shop doing it?
    New motor mounts might bring the exhaust up some too.
     
  4. 5-oh-MUSTANG

    5-oh-MUSTANG Well-Known Member

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    Here in Canada I dont need a visual for emmisions. Just sniffer for my obd1. So you think it should be fine with the first 2 cats, and can remove the middle two?
     
  5. CC'S95GT

    CC'S95GT Legend

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    I would think so. It's wierd that they wouldn't look under the car when the car is getting sniffed.
    You might still need to pull the spout while it's getting sniffed to get it to pass.
    Mine will barely pass with the spout in but remove it and it passes like it's not even running. I'm running a Bassani catted X btw.
     
  6. B.mad

    B.mad Well-Known Member Preferred Vendor

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    you guys are lucky. I know people who will over look the visual, but with no cats, you wont pass the sniffer here in cali :/
     
  7. ttocs

    ttocs Legend

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    do they have mountain sized speed bumps up there or are you just hitting them full speed? You car doesn't look like its all that low, what kind of headers are you running?

    I have a magnaflow catted-x pipe and love it, but then I also love my air ride so....
     
  8. CC'S95GT

    CC'S95GT Legend

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    I bet you would if you pulled the spout for the test. It is really that big of a differance.
     
  9. 5-oh-MUSTANG

    5-oh-MUSTANG Well-Known Member

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    Its my damn mechanics shop. It is ridiculous getting in and out. Thats the only spot where i scrape even if i go really slow and carefully. Running stock headers btw.
     
  10. the5.ohh

    the5.ohh Legend

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    See why i won't lower mine?
     
  11. ttocs

    ttocs Legend

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    no no no wait wait wait wait. See why I got air ride?!:headbang: WELL HELL YES YOU DO!
     
  12. BMAC96GT

    BMAC96GT Active Member

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    Its always crazy to me to hear about you guys trying to pass inspection. The guy I take it to here checks my lights and wind-shield wipers and NOTHING else and just slaps a sticker on it. I never even have to think twice about emissions. I'm running a cat-less H-pipe with just flowmasters
     
  13. 5-oh-MUSTANG

    5-oh-MUSTANG Well-Known Member

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    You dont even have cats lmao. And plus my x brace hangs lower than ur long tubes and I barley scrape that.
     
  14. ttocs

    ttocs Legend

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    I did air ride because of my side exhaust, would have a hard time getting out of the driveway with out it.

    If its this much of an issue now though(2nd time) I might try to figure out some kind of scrap guard for them or something...
     
  15. 5-oh-MUSTANG

    5-oh-MUSTANG Well-Known Member

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    Lol thats what im trying to ask... Can i take off those 2 cats and replace them with piping or gut them? What are the drawbacks?
     
  16. ttocs

    ttocs Legend

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    sure you can and there are some companies that make a removable piece so you can swap the cats in for emissions testing easily. The disadvantage is you would probably fail inspection with them off...
     
  17. Magic

    Magic Well-Known Member

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    Hard to say if you will or wont pass the sniffer with the rear two cats missing.

    Either replace that one cat. convertor or gut both the rear ones and go from there.

    Also it sounds like your exhaust is not aligned properly.
    When at the shop, put a stand underneath the mid pipe after the bolts have been loosened up, push the mid pipe up as far as you can with the stand then tighten the bolts.
     
  18. 5-oh-MUSTANG

    5-oh-MUSTANG Well-Known Member

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    My mechanic tightend it up and tucked it. Im not worried about visual. Plus i pass with an after market h pipe that only had 2 cats before? Is it that the pre cats are different from the other 2 rear cats on this x pipe?
     
  19. the5.ohh

    the5.ohh Legend

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    I know but still, my x pipe hangs low. And the LT's aren't my problem at all, they're not close to scraping anything.
     
  20. FivepointSlow

    FivepointSlow Well-Known Member

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    Solution:
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    **** the police
    Slam it


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