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Topic Review (Newest First)
11-28-2011 10:42 AM
racing2815 Thank you all for the info... Greatly appreciated..
11-27-2011 06:46 PM
Feed_That_Jones You can go to magnaflows website and it will tell you how big of an engine that one is rated to.
11-27-2011 02:49 PM
opcocrg This is what I'm looking at........

Buy MagnaFlow Universal Catalytic Converter 94005D at Advance Auto Parts
11-27-2011 02:44 PM
opcocrg
Quote:
Originally Posted by Jerry Bransford View Post
Don't worry about high-flow cats, it won't make any difference. Besides, your engine was designed to work into some backpressure which from what I have read helps improve low-end torque.
Good to know. So is it safe to assume that if I just find a dimensionally comparable match for the stock cat and have it welded in place I should be good to go? Is there a magnaflow replacement that has the o2 bung already in it or will I need to have one welded in behind the cat as an extra step?

Thanks for the help....
11-27-2011 01:31 PM
Jerry Bransford Don't worry about high-flow cats, it won't make any difference. Besides, your engine was designed to work into some backpressure which from what I have read helps improve low-end torque.
11-27-2011 01:26 PM
opcocrg I'm frustrated with my inability to understand what is and isn't a "high-flow" cat from magnaflow. I can only assume that the ones sold as "off-road only" are high-flow and all others are not high-flow. Am I thinking correctly or am I missing something?
11-27-2011 08:33 AM
racing2815 Thank you all for your input.
11-26-2011 11:26 PM
Feed_That_Jones My 06 dosent have a sensor before or after the third cat. That being said, i replaced mine wed. because of a dent i had put in the stock one. Magnaflow High-flow cat 45 bucks on ebay. Part number was 94105 iirc.
11-25-2011 03:36 PM
joeinajeep To eliminate the CEL, just strap the rear o2 sensor to the outside of the exhaust pipe. Keep your front o2 sensor intact though.
11-25-2011 12:44 PM
revhead347 The ecu will throw a code unless you either modify the program or run something like an MEL eliminator in line. Re moving the cat can lower your low end torque on some engines. If your cat is just bad, I have had excellent luck with the Magnaflow cats. I use a 16" Magnaflow on my emissions pipe for street car. The car gets a 10/192 limit in the HC emission, with a small block Ford .577" lift cam and a 112 deg lobe seperation.

Kurt
11-25-2011 10:19 AM
joeinajeep Typically, there's a sensor right after the cat. You can straight pipe it, but prepare to address any local smog checks, check engine light, and other considerations I'm sure you will see posted soon.

I don't use a cat, fwiw.
11-25-2011 10:10 AM
TnDz TJ
Quote:
Originally Posted by Neil F. View Post
Yes you have O2 sensors on the inlet and outlet sides of the cat.
Well... that depends on the year/engine.... I have 3 cats on my 04 I6. the two on the down pipe have O2's upstream and downstream, totaling 4.... the cat just before the muffler doesn't have any sensors at all.

If your smog Nazi's do a visual on your Jeep and find the CAT isn't there, they could turn you in for tampering... its all about the law.....
11-25-2011 09:01 AM
Neil F. Yes you have O2 sensors on the inlet and outlet sides of the cat.
11-25-2011 08:15 AM
Atthehop Check your state inspection laws first.
11-25-2011 07:45 AM
racing2815
Catalytic converter

Can i replace the converter with a straight pipe? I didn't see an oxygen sensor attacheted to it. If there is, i might just be blind...

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