will it hurt my car if i remove the cats???

 

It won't hurt the car, but it will make it fail inspection. Emission inspection is getting tighter all the time. If the cats are good and you remove them, it won't do much to increase performance. If your car is OBD II, the rear set of O2 sensors will cause the PCM to set codes, so you need to replace them with SIMS to keep the PCM happy.

 

remove your cats right after you get the car inspected. that will give you a few years, but keep the cats, because next time its inspection tim you can jsut throw them on quick. taking out your cats is going to slighty improve gas mileage, along with upper rpm power, but not very noticeable.

 

I don't know where you're out of, but in CT if your car is 25 years old or older, you're exempt, no testing whatsoever. So if your car is pretty old I'd check your states regulations on it. I have an 80 z28...no cats for me, haha

 

You could just install cut-outs in front of the cats. That way you can chose when you want to use them, like for inspection or whatever. Of coarse then you will be bypassing the rest of youe exhaust system as well, so it's up to you. It will definately not hurt your engine.

 

ok thanks. and i live in Ohio and i believe that we are done with the whole E-Check rip off so i just may

 

This would be very hard givin the location of cats in a 4th gen. Also it would by-pass the rear set of O2 sensors which will cause a CEL and put the computer into safe mode. If you remove your cats just get a set of O2 sims or a proper tune and be done with it.