99kon

iTrader: (6)

What is the best way to gut your cats?
Will the engine light come on?

quicksilverado

iTrader: (8)

Take the y-pipe off. Use a long screw driver and hammer and go to town. You will need to have the rear o2s deleted with some kind of programmer.

99kon

iTrader: (6)

Thanks!
Will deleting the o2s hurt the performance (fuel mileage etc)?

budhayes3

iTrader: (19)

Deleting the rear O2's won't hurt mileage, performance, etc. Their purpose is to monitor the cat converters. The front O2's are the important ones that the PCM uses to adjust a/f ratio.

98TAauto

iTrader: (2)

im not sure if its the same for the trucks as the cars, but i heard you will have 4* of timing pulled when the ses light is on? Im not sure if its true, but ive heard it mentioned a few times. But no, its not gonna hurt anything

James B.

iTrader: (1)

Don't do it, there's no point. Exhaust stinks and the cats also help reduce raspy sounds in the exhaust. The stock cats on these trucks are some of the best flowing stockers in the automotive industry. Seriously. I am running more than 500HP through my stock ones right now. No problem.

w41quad4

Running over 500hp through the stock cats doesn't mean ****. You could run 1000hp through stock cats, or say suck a golf ball through a garden hose... you can do anything the point being its not very effective.

I've removed my cats and have noticed an increase in power and also a reduction in my ET's. The exhaust wont get nearly as bad as you think especially if you have a chambered muffler on there. I've ran a Dynomax Bullet and it wasn't that bad, but now that i've gone to a Aerochamber is perfect, no resonnance or 'raspiness'

James B.

iTrader: (1)

No need to be rude.

BlownChevy

iTrader: (20)

Remember you are tearing up 800+ dollars worth of cats.

TurboGibbs

iTrader: (6)

Yeah, save the honey comb and powder. You can get good money for it at a cat recycler.