Reloy

I've been told that if I want to do away with the cats on my 2000 5.3 chevy,,that it will mess with the sensors and it wont run good. Has anyone here done that? I have a gibson exhaust,,just from the cat back...
I'm really just looking for more power, and Oklahoma doesnt do any vehicle inspections anymore!

DV2000NJ

iTrader: (10)

You won't gain any power from removing the cats on an essentially stock setup.

Reloy

why no power gains? It has the Wheatley tuning

HoveyBayou

iTrader: (3)

You will gain 1-3hp by removing the cats on a stock setup. Not worth it and the trouble it will cause because you don't have the tune set to compensate for it and will require a retune.

02ws677

would it be worth getting high flow cats? Mainly looking for better sound.. Have dual flowmasters on it now, 5.3

Sc00by

From what I have heard its not worth just removing the cats. If your going to go through all that trouble (including re-tuning your truck to run with out cats) its worth more installing a good set of long tube headers a new y pipe (if your going to still use the single tube exhaust) and then having it tuned. Way more gains.

Evil Eric

iTrader: (3)

like scoob said, the only reason u should remove the casts is if you are installing long tubes. the only other reason i would cut off cats without any other exhaust mods would be a clogged converter. The gains are just not there.

Reloy

ok, thanks for the input. This summer its getting a cam and headers,, so maybe then different exhaust setup,, We'll see.