i am putting the replacement pipe on instead of buying a new catalytic converter, because its cheaper and sounds better. but the replacement pipe is just a strait pipe in place of the catalytic converter and there are no holes in it to put the oxygen sensors. So what do i do with them or how do i get the engine to work properly without them?

 

you need an 02 sensor bung welded in. that's where the 02 goes

 

is your cat bad. cause if your just looking for it to be open and a free flow just pound the inside of the cat out and make sure its cleaned out good and go out and buy two spark plug nonfowlers and screw them in and to the holes were the o2 goes into the cat and then screw the o2s into the nonfowlers. what they do is raise the o2s out of the cat so they read less fums. i did that to my car and it didnt throw any codes and is runnin great