I am After getting a new exhaust for my non turbo 300zx,,because it is a 1990 is it true that you can do away with the cat??

Is the gas sensor before the cat/in the cat /after the cat?

And could any body tell me what the 2 pipes that go into the exhaust just before the cat are for,,,they go on from either side and look like they come from the engine,,,,i take it i would have to get an exhaust that had inlets for these unknown pipes.

I cant get cat back exhausts because there is a small hole just before the cat :-((

 

Could i just cut the cat out and replace it with a straight through pipe and keep the existing exhausts?

cheers guys

 

 

[This message has been edited by civic (edited 30-08-2002).]

Pre 91 cars dont need a cat but legally you are not supposed to take them off if they are fitted, but i would any way. The 2 pipes go to some valves behind the front wheels, think they just clean the cats not sure, so if you do take the cats off you can then just leave these pipes off. Dont block them up tho.

There is currently a gb on the mongoose exhaust dont know if it has finished yet. Might be worth having a look.