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.

 

dude way wrong forum you will get eaten alive for that haha take it somewhere else

 

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.

 

depending on the model of your car ...

1. you won't have a place for your O2 sensor
2. even if you did, you'll blow a CEL every time.
3. they're illegal
4. you'll "gain" 1hp if you're lucky.

 

pointless mod

 

eat my snake h: