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CAT to straight pipe???

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Old Apr 18, 2009 | 12:39 PM
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CAT to straight pipe???

OK whats the trick to getting an exhaust shop to sell me a straight pipe and will i need anyother parts to do this?

2 differant shops told me its agains the law to remove the CAT and put on a pipe.(Im still gonna do it)
 
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Old Apr 18, 2009 | 02:07 PM
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just look for cat delete pipes at various diesel websites... pretty easy to find
 
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Old Apr 18, 2009 | 03:42 PM
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yep, type in powerstroke downpipe, basically anyone who sells a DP will sell a cat delete.
 
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Old Apr 18, 2009 | 03:52 PM
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If your state requires emission inspection for your rig then you probably don't want to delete it as they will require you to put it back on. If not then yes to the above and just get rid of it. It's not really a CAT as in gas vehicles but a particulate filter. Some remove it then beat innards out then reinstall the shell. Here is what the inside looks like on our CAT as I sliced mine in half after removable. Did you get those bolts off to see if it was plugged up ...

 
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Old Apr 18, 2009 | 04:52 PM
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Hussler i got the CAT and DP apart and its being a booger on the back side.
And from what i can tell this may have been what was causing my restriction.
Truck feels and sounds much better going down the road with the exhaust unbolted, i really hear the turbo whissle now.
 
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Old Apr 18, 2009 | 05:07 PM
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Originally Posted by Byrddog
Hussler i got the CAT and DP apart and its being a booger on the back side.
And from what i can tell this may have been what was causing my restriction.
Truck feels and sounds much better going down the road with the exhaust unbolted, i really hear the turbo whissle now.
Sounds like you are making progress.

If you are referring to getting the CAT off the back side of the exhaust, well that can be changeling. Took me and a buddy biggest part of a day to beat that thing off. It's quite heavy for a small device so be careful as you will have some bruises if it falls on you.
 
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Old Apr 18, 2009 | 05:17 PM
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Originally Posted by Hussler
Sounds like you are making progress.

If you are referring to getting the CAT off the back side of the exhaust, well that can be changeling. Took me and a buddy biggest part of a day to beat that thing off. It's quite heavy for a small device so be careful as you will have some bruises if it falls on you.
This is when i need a shop and a lift!
BTW Hussler what is that thing filled with it looks like screen in the pic?
 
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Old Apr 18, 2009 | 05:46 PM
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Originally Posted by Byrddog
This is when i need a shop and a lift!
BTW Hussler what is that thing filled with it looks like screen in the pic?
Yep, very fine mesh screen where I don't think a Nat's a$$ could penetrate. And each additional layer is rotated 90 degrees, hundreds of them, maybe thousands .. best guess. Probably a good design before ULSD emerged on the market.
 
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Old Apr 18, 2009 | 07:29 PM
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Beat the guts out of the cat and put it back on. About the only way you might get a shop to remove the cat will be to give them the $20K to cover the fine if they get caught removing the Cat.
 
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Old Apr 18, 2009 | 08:21 PM
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Originally Posted by tjbeggs
About the only way you might get a shop to remove the cat will be to give them the $20K to cover the fine if they get caught removing the Cat.
Is that in states with emissions regulations? First place I went to wanted 60 bucks just to remove it, went next door and they took it off and welded in my straight pipe all for 50 bucks. Made my day
 
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Old Apr 18, 2009 | 08:44 PM
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Originally Posted by KevinC.
Is that in states with emissions regulations?
Nope its federal law to the best of my knowledge. We operate in Michigan and can't remove cats. Not even really supposed to work on exhaust with a missing cat if its supposed to have one unless we are putting one on.
 
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Old Apr 19, 2009 | 01:25 PM
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Learn somethin new everyday. I live in a small town though, they were probably just happy to have business.
 
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Old Apr 19, 2009 | 05:14 PM
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what if it "fails" or "rusts through" would you have to replace it?
 
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Old Apr 19, 2009 | 05:20 PM
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Originally Posted by JethroF250
what if it "fails" or "rusts through" would you have to replace it?
Best guess .. YES.
 
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Old Apr 19, 2009 | 05:23 PM
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hmmm. i guess if i have to in the future may go to a junk yard and get one. possibly movin to VA Beach after college. only goin for summer this year so aint changin tags. but if i do im thinkin probly gonna have to find me a kitten
 
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