you probably should keep the cats, there's no real performance advantage to taking them off newer trucks, but i sure do love the sound mine makes without them!

 

It depends on where you live. If you live in say, California, or some other state that has emissions requirements, they will cut off one of your hands if they catch you with no cats. I live in Arkansas right now, where no one gives a crap about anything, so I cut mine off.

Also, on newer trucks- losing the cats will throw trouble codes and kill your mpgs because the O2 sensor will get pissed off. A O2 simulator tricks the computer into thinking the cats are still there and you wont have any more codes thrown. Mine cost about $40 installed. Its just a little black box that you wire into the O2 sensor under the truck. pretty easy fix, but they are illegal some places. once again it just depends where you live.

 

You would want to consider shorty headers if you live anywhere that you have to meet emissions requirements, long tubes otherwise. Shorty headers should bold right up to the exhaust flanges as they are pretty much a direct replacement for the stock exhaust manifolds.

 

at the risk of being repetitively annoying, i have a set of shorty headers for a 5.3 for sale

 

what brand? how much? and why are you selling them?

 

Don't worry BlackHorse, I do the same thing. People (myself included) need to start using the 'search' function on here. Prime example, how many times have they posted the free mods list? Lol.

 

I had 95 Z71 that the exhaust rusted off on and it was plenty loud. I miss that old truck but i made money on it when i sold it. LOL