what would happen if i cut off my 2nd cat? would the check engine light come on? and is it illegal?

 

Remove them both and install high flows.Your front o2 sensors wont be affected,remove the piece of factory pipe that has the bungs for your o2 sensors and have the muffler shop cut them in as part of the install.Either use your rear o2 sensors or run the o2 eliminators,if not you will get a cel.The difference in performance and sound is worth the $ you spend for the install.I've had my high flows on for 2 months now and no problems.You wont be disappointed.Good luck w/ your exhaust.

 

i cut my rear ones out, and i didnt even get a cel.

 

it wont come on for a couple days. i put o2 simulators and the light went off.

 

02 simulator? what is that?

 

o2 eliminators are an electrical part that you plug in to your factory harness where the plug for your o2 sensor goes.It allows the computer to read that there is a sensor there,and the sensor is working so you won't get a cel. It basically "tricks" the computer.Summit racing.com has them,Jegs has them,they are pretty common.They run about $60.00 a pair.Hope this helped.

 

can i remove both of them and put one hi-flow on? and i only have one o2 sensor, and a air hose.