Straight Piping Stock Exhaust - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 10-31-2007, 06:50 PM Thread Starter
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Straight Piping Stock Exhaust

OK, so i'm seriously considering straight piping my truck, but i'm concerned about emission requirements. I already have a gutless CAT, but would removing my muffler cause me to fail the visual inspection portion of emissions in the state of Colorado?

HI.....I'm Kyle
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Now: 2006 Ram 2500 CC SB SLT 6 Speed
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post #2 of 14 Old 11-01-2007, 12:55 AM
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I don't think that it will fail your emissions to not have a muffler in Colorado. Plus, I don't think that you have to have a cat on the exhaust either. Diesels emission rules are different than gas. Call a mom and pops exhaust shop. They'll know. A second option is register in Weld County or get farm plates. Then you don't have to worry about emission.
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post #3 of 14 Old 11-05-2007, 06:15 AM
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or you can cut out the muffler and then put clamps on it and on the straight piece you weld in or if you wanted you could just go buy a stick of pipe and put a cuppler on it and keep your stock exhaust stored until you need it for emissions.

God Bless Chris Ledoux
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post #4 of 14 Old 11-13-2007, 03:06 PM
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I have a 95 f-350 , if i was to remove the cat , would i notice anything in performance wise and also would i hear the turbo spoll up .... i was planning on leaving the muffler juss takin the cat off
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post #5 of 14 Old 11-13-2007, 07:54 PM Thread Starter
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Originally Posted by Brfootball45 View Post
I have a 95 f-350 , if i was to remove the cat , would i notice anything in performance wise and also would i hear the turbo spoll up .... i was planning on leaving the muffler juss takin the cat off
Yeah guttin that cat will help reduce backpressure and allow the turbo to spool up a bit quicker (which you can hear). But I wouldn't just completly delete the CAT (for emissions reasons), I'd take her off an punch all of the guts out and then put it back on.

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post #6 of 14 Old 11-13-2007, 08:40 PM
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About punching all the guts out. How would you go about doing that? I have tried and it was solid in there.
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post #7 of 14 Old 11-14-2007, 07:45 AM
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yeah how would you punch the guts out of the cat
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post #8 of 14 Old 11-14-2007, 08:01 AM
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all i did was cut the cat and the muffler off, measured what i needed and went to the muffler shop and got 2 pieces of pipe flared on the ends and took it home and welded it on. did that for about $30 bucks... ive been pulled over 3 times since.... one for taking off to fast and blowin smoke but the cop didnt even look... so i wouldnt worry to much about emmisions. but anyways to gut a cat, we did this to my friends, you need to take it off and just get a metal pipe or rod that fits in there and start beating it with a hammer or something, just keep at it untill all of it comes out, it takes a while so be patient.
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post #9 of 14 Old 11-14-2007, 11:15 AM
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im not a fan of the black smoke and everythiin if i cut the cat out and replace it with a pipe will it blow smoke or no
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post #10 of 14 Old 11-14-2007, 07:12 PM
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No, it won't blow smoke from just gutting the cat. I wish it did though lol
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