Im lookin to remove the cats on my 00 yukon slt 5.3..... Any noticable power, truck has 143K on it, all stock exhaust on it still, and will it throw a code, and run like ****????????? Help me out here fellas.... THANKS

 

throw a code, yes until you tune it out or get extensions.
noticeable power, again until tuned, probably not.
way louder, yes
run like ****, probably not.

 

 

so it will run like **** till i get it tuned???? about how much louder will it be??? will it sound like hell???? or just a bit loder.... noticable power,where acceleration, or like top end

 

It's pointless. The stock cats flow very well.

 

even with 143K on the clock????? I figured maybe they would be a little clogged, I was just have pipes welded to replace them

 

do you have symptoms of being clogged? i.e. hesitation at high rpms

 

not really sometimes when i start it after it sits for a whle, and put it in gear rverse or drive, and give it gas it does feel like it hesitates for a little, i can see it on the rpm gauge, thats why i figured the cats??? I don tknow if it ever had a tune up, if not whats a good plug to put in,,,5.3.... and should i get new wires????????

 

Best way to get cats off your truck is to put a can of tuna with a crushed up light bulb under it.