Skip to main content

Site Navigation

Your Account

Choose Language

Discussion Topic

Do I take off catl. converter and replace with flow thru muffler?

I have a 06 cat w/ a catalytic converter. Has anyone replaced this with a flow thru muffler? How did you do it?

Reply to discussion Subscribe to discussion

Is this a worthwhile discussion?

Score 0
Add a comment

4 Replies

First of all, a couple of questions to help you make some decisions. Does this catalytic converter have any wires, sensors, probes, or tubing attached to it or after it? The few that I have seen don't, but they were a couple years older. What states do you run in? I have never had a emission equipment inspection, but we will probably see more of them in the future, I would be cautious if you go into California. Have you ever priced a new catalytic converter? From what I understand, they can cost between $3000-6000. OUCH. I have seen units that are about 1-2" larger in diameter than a standard muffter which is 10". I am currently using a Donaldson M100463, I did a lot of research on this one and checked the cfm flow rating, it can handle the flow of a 600 hp caterpillar no problem, it was very free flowing and cost less than $100, check ryderfleetproducts.com. It is technically a off road muffler, but nobody can tell the difference, it might be a couple of db's louder than a stock muffler.

You may want to take off the catalytic converter/muffler and safeguard it for future use when the regulations get more strick or if you ever get in trouble for removing it(I mean replacing it because it rusted out) but didn't have the money to replace a overpriced $4000 muffler.

I would have removed that thing eons ago, but REMEMBER, DON'T JUST THROW IT AWAY, IT HAS RECYCLEABLE VALUE AND IS PART OF THE FACTORY INSTALLED EMISSION EQUIPMENT.

I know this is not really a solid answer to your question, but merely food for thought. Hope it helps.

Was this reply helpful?

Score 0

Comments:

Thanks everyone for the info. We do go to Ca. all the time. That's what we were worried about.

by

Add a comment

if you have a converter it should have a beehive cone type center,its possible to remove it and empty it,note if like john says if sensors are involved could cause fuel loss,also it could be against the law depending where you drive.

Was this reply helpful?

Score 0
Add a comment

I have a 2005 Kenworth with the c-15 accert, I removed mine almost 4 years ago and replaced with straight pipe I have only been out to California a couple of times in those 4 years but have had no problems through typical inspections and I gained .5 mpg by removing them

Was this reply helpful?

Score 0
Add a comment
Most Helpful Answer

I replaced both catalytic mufflers with flow through mufflers on my 2005 Peterbilt. I run the entire length of CA twice monthly, no issues. At the end of 2013, it won't matter anyway.

Was this reply helpful?

Score 1
Add a comment

Join the discussion

Susan Freeman will be eternally grateful.
View Statistics:

Past 24 Hours: 1

Past 7 Days: 10

Past 30 Days: 36

All Time: 3,436