I got a 2500 with a 6.0 and was wondering if I can gut my cats or take them out. I live in a state with no emissions but was curious if the truck would run right .

 

Yes. If you do not have emissions testing you can remove your cats. You will throw a check engine light which will need to be fixed in order to pass inspection

 

Are the gains noticable?

 

I picked up a few MPH in the 1320 after i cut my cats off.

 

gains wont really be noticeable at all untill you retune for the new airflow. simple as that. But yes, its a difference.

 

If your going to go through the work of taking the Y pipe off just to gut the cats why not get long tubes and a ORY?
Btw my neighbor gutted his cats and put a flowmaster on his 2500 and it honestly sounds like horse ****

 

On the forum i mod we ban for cat removal talk... Then again it is a offroad forum where people catch stuff on fire doing this...

It is a federal law... Its illegal whether u have emissions or not... Run a high flow cat... They flow just as well but stays legal and doesnt hurt anything... Spun high flow cats on ebay are only $40...

 

From the tiny gain you get from removing the cats seems hardly worth it when considering the environmental impact.