i have the part number 99106hm and now the check engine light is on after about 3 months, and it said that my cat is going bad anybody else use this one and have this problem? so how do you strip out a cat

 

how many miles are on the cat? are you sure it's the cat and not just the sensor? You should easily get 100,000 miles + out of a maggie cat unless your truck has issues (plenum leak) and is burning a ton of oil...

 

Yeah, Im thinking you either have a bad sensor or an exh leak

 

no leak and for all i know that could be the org. o2 sensor so where do i buy a 02 sensor and i have headers too does that burn up the cat i only put a 1000 miles on the truck since the cat install.... hey weedahoe what cats are you running

 

I've put close to 30,000 miles on my truck since I installed my long tube headers, still running the original cats, no issues to date. If anything you are running leaner with headers, this should extend the life of the cats...

 

I second the plenum leak- oil will make short work of a cat.. If you do swap o2 sensors though, make certain and get NTK/NGK's.. for some reason our 5.9's hate Bosch, which is likely the most popular brand out there.. Header shouldn't hurt your cat at all..

all of that being said: Magnaflows (which I run too) are known to have problems.. Some work out for a long time and flow really well, while others (of exact model and even lot number) blow the eff up in no time.. You may have just gotten unlucky.. You may also be able to take it up directly with magnaflow too..

just my .02..

 

am not seeing any oil issues i did call magnaflow and they told me thae part number is for dodges 1996 to 2000 5.9 motors and mine is a 2002 so they told me i was sold the wrong one

 

ngk o2 sensors

 

Sorry, I have NO cats.

 

does your check engine light come on how did you bypass that how can i find a muffler shop to do that for me