i am currently running all stock cats with no muffler.. i am looking for louder exhause and am thinking about replacing cats with pipe.. which cats should I remove to NOT get a CEL??

and any pics available would be greatly appreciated,, thanks in advance


oh and i have a 2002 5.4L v8

 

Honestly your best bet is to remove all four and put in two magniflow 94106 high flow cats if you still want cats but a louder sound. They are cheap, about $96 shipped for two. I'm saving money for some long tubes and those cats. Should be a bomb set up.

 

depending on were you live remove all 4 if you dont have emission checks. i live in MI no tests here. if not remove either or i dont think it matters im not sure thoe.

if you remove all 4 yes you will have a CEL for the rear 2 o2's you can get a programer and make that go away. it doesnt effect how the truck drives thoe.

 

I removed the much larger rear cats. It made the truck NOTICABLY louder, and I didn't throw a CEL.

Deleting the rear cats is a lot easier and cheaper than replacing and adding in aftermarket cats.

 

The rear cats ( longer ones ) are the ones you should remove, not the smaller ones closest to the engine.

You still might get a CEL in your model, but it can be very easily fixed. Gotts O2 mod, look it up on here.

 

being that there are no emmisions here.. heres what im thking.. okay, well i went and got the stuff for the GOTTS O2 mod, if i remove all four and just do the gotts mod it will not effect the performance of my truck, correct?

 

nope i havent run cats in over 3 years. if you take the cats off and take it up to a local exhuast shop they can bend a stright pipe to match your cats. thats what i did. or get longtubes and you wont have to worry about a down pipe.

i noticed a lil more power and a better tone with no cats. not to mention it smelled so much better than with cats

 

^ exactly!!!

 

^ exactly x2!!!