removing the cats from my ls1 camaro SS

**sweet ss** · 03-31-2007, 06:41 PM

Hello everybody. I was wondering what would happpen to my LS1 if I removed the cats, and the egr system would I get considerable gains in horsepower and performance? is there a way to override the cats without taking them off?

**silver35thss** · 03-31-2007, 06:54 PM

I have an 02 ss and i cut the cats off completely. I put a flowmaster in the back with 3" tubing all the way back in a Y pipe. I felt the difference immediately. The sound is great too, get compliments every day! check engine light will be on, but an oxygen sensor eliminator on the bottom 2 o2 sensors will stop the light from coming on.

**sweet ss** · 03-31-2007, 07:16 PM

It does have a great sound.

Where can I get those sensor eliminators?

Did your car run rough after you cut the cats off? Mine did so I reset the PCM. It ran good for a little while then started running badly again. It started miss firing,& lost power. the same day i ran out of gas about 2blocks from my house
I barely got home when the thing finally quit. It backfired ran rough and finally quit running right in front of my house. Since then it hasn't been running right. I thought maybe it from removing those cats.
HAS ANYONE ELSE EXPERIENCED THAT SAME PROBLEM??

**67CamaroRSSS** · 03-31-2007, 07:24 PM

I haven't had a problem. I deleted the cats when I went to LT's and a ORY. I also had a friend tune out the ses light for the missing front (or was it back, I forget) O2 sensors and the deleted AIR.

Also, what your asking about are O2 simulators (not sensors).

BTW: I NEVER run less than 1/8 tank before I fill up as the pump will run dry and cavitate. This can be problematic.

**silver35thss** · 03-31-2007, 08:34 PM

When i cut my cats off the car ran fine and is still running fine, it still has that cutout, backfiring sound but mine is from the flowmaster, typical flowmaster sound. I have a buddy with another SS and he has straight headers into three inch and nothing else, loud as hell and runs fine.

**NandoLs1** · 02-07-2017, 06:51 PM

Originally Posted by sweet ss

It does have a great sound.

Where can I get those sensor eliminators?

Did your car run rough after you cut the cats off? Mine did so I reset the PCM. It ran good for a little while then started running badly again. It started miss firing,& lost power. the same day i ran out of gas about 2blocks from my house
I barely got home when the thing finally quit. It backfired ran rough and finally quit running right in front of my house. Since then it hasn't been running right. I thought maybe it from removing those cats.
HAS ANYONE ELSE EXPERIENCED THAT SAME PROBLEM??

Have you fixed this problem ? If so how did you fix it ??