Removing cat any benefits? - Dodge Cummins Diesel Forum
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post #1 of 20 (permalink) Old 01-09-2020, 09:20 AM Thread Starter
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Removing cat any benefits?

Are there any benefits to removing the cat or and cons?

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post #2 of 20 (permalink) Old 01-09-2020, 10:43 AM
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Some people have reported they lost a little bit of fuel mileage from removing it. Somewhere from .5 to 1.5 MPG is what they lost.

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post #3 of 20 (permalink) Old 01-09-2020, 11:21 AM
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No benefits at all

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post #4 of 20 (permalink) Old 01-09-2020, 11:56 AM Thread Starter
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Would a banks intake or exhaust from cat back have any benifits?
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post #5 of 20 (permalink) Old 01-09-2020, 01:54 PM
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Quote:
Originally Posted by 5cheel View Post
Would a banks intake or exhaust from cat back have any benifits?
Only a smaller amount in your bank account.

What are you looking to gain?
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post #6 of 20 (permalink) Old 01-09-2020, 02:08 PM
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your exhaust will smell better, like an old school bus.
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post #7 of 20 (permalink) Old 01-09-2020, 07:08 PM
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Re

When I bought my truck new I removed the cat and had a straight flow Magna Fow muffler put on .That it was great until I pulled the 5th wheel over to the Coast and BLEW my ears out ! 😔Luckily the wife was driving her car there so I have to say it saved me from a Hugh argument. After returning home I ran back and had the Cat put back on and it has a great sound but doesn't blast out your ears pulling hills ! 🍻
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post #8 of 20 (permalink) Old 01-09-2020, 08:47 PM
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Removing a cat is a mixed bag of benefits and problems. EGTs drop by about 200 degrees (especially if you replace stock muffler at same time), less back pressure and quicker turbo spool up (especially with tuner and cold air intake,) more black smoke, considerably more exhaust noise and drone, black soot on rear box panel, stronger diesel exhaust smell. You can manage the noise with an FTE resonator and a performance muffler. High mileage cats (particulate filters really) are often plugged up and rob the engine of performance.

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post #9 of 20 (permalink) Old 01-09-2020, 09:52 PM
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And it might get you in trouble with the Green Police if we keep allowing democrats to get elected:

California Emmissions

"By January 1, 2023, nearly all trucks and buses will need to have 2010 model year engines or the equivalent."

And it's not just for trucks:

CARB - Passenger Cars
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post #10 of 20 (permalink) Old 01-09-2020, 09:57 PM
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I don't like the black smoke. Clean power! The more you take off a 5.9 cr with a stock manifold, the more they sound like poo.

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post #11 of 20 (permalink) Old 01-09-2020, 10:30 PM
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Toleration of exhaust noise is such a subjective thing, really have to know where you personally stand to make a decision.

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post #12 of 20 (permalink) Old 01-09-2020, 11:55 PM
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^^^ 2nd gen swap ftw! No poo... I tow heavy, I went back to a 40" muffler for a more family outfit.

-2008 6.7l QCLB 4x4,g56,J-67(23ME),valair DD,64.5/72/14,2nd gen mani,arp 425's,boost and pyro... -1993 W250 CCLB...
-1996 brewed s14 w/ 386 rwhp & 341 rwtq @17psi twinscroll baby!!!(gt3076r)
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