So, I had a no muffler to begin with, then added a magnaflow which has a nice tone but is pretty quite. so i was thinking I should either get the cat gutted or just have it removed from the exhuast system?

will this hurt anything that has to do with back pressure or mpg's?

anyone have a truck with no cat but a muffler?

 

you can get the jegs off road y pipe and do the spark plug no foul thing for the 02's and youll be good as long as you dont have to smog where you live

http://www.jegs.com/i/JEGS+Performan...31020/10002/-1

 

as long as you don't have an emissions test to fail, there is no harm.
it wont hurt the truck.
it might (or might not) set a CEL for poor cat efficiency.
the low end loss argument is overblown.
i don't think it will change MPG any.
DO leave both your O2 sensors in place.

without a cat - your exhaust will stink, and its louder.
i don't recommend gutting the cat. i think the hollow box acts like an expansion chamber on a 2 cycle and to me - is too loud and clattery.

i have the ypipe above and the stock muffler. its a little louder.

 

I agree with dhvaughan, my exhaust stinks worse after I had my cat cut out and it deffinetly made everything louder.( I still have to do the spark plug non fouler trick)

 

I too have gutted my cat and I hate the noise. Clattery is the best description you can come up with. It ruins the sweet note of the rest of the exhaust. But I have had no performance problems with it.