Originally Posted by snake eater
What will happen if I replace the stock catalytic converter with the straight same diameter pipe. There is still a mounting place for the O2 sensor. The headers and intermidiate pipe is stock and catback exhaust. Will it decrease the performance of the engine.What are the noticeable negative changes.
and some say it gives better flow some say it gives to much flow. and depending on where you are sorry didnt look it is illegal not to have a cat on there. so it all depends on preference.