I have 2 problems withe my Gs430 "04

The first problem Removed the catalyst converter and then I check Engine show up on my dash boord ??!

I have deleted it by computer but its still comeing back after 10 minutes

I do not know what to do Is there a way to remove it because I dnot want catalyst converter

The second problem I have purchased the SRT air intak
and befor I Install it I had a 273HP on the dyno but when I Installed the SRT intak the HP was 230HP !??? why???


evrything in my car is ok but there is the error from the catalyst converter

can somebaddy help me plzzzzzzzz

 

What was the code that you were getting? Are you sure it's for the cat or the oxygen sensor?

 

im sure that it was for the cat not the o2 sensor i dont remmber the code but its something like tech 11 something like this when i see it its telling me that the error form the catalys and the sensor is working good and new ^_^