i am soon going to get a catback put on my car and today i realized(sp) that there is a hole on the top of my cat. should i just go with out a cat or should i spend the mo and get a new one. IDK how these cars react to having no cat and if ne one knows how it is w/o one, please let me know if its or . i am thinking just strait piping.

 

my rex is running straight pipe, it does not harm ur engine to not have a cat, do u know what a cat does? if u don't I can explain it to you. I would definitely recommend a high flow cat. I M going 2 put one on my car when I get my new cat back next month. straight pipe is just going 2 cost u more in the end (when u need to get ur emmissions checked). u should probably check the emmission laws in ur state to see how strict they r. some engines, like the civic cvcc engine, do not even come with a cat yet still pass C.A.R.B. tests.

 

No Cat.

 

not cat for me = no passy state inspection

 

here in indiana we dont have an emissions inspection test

 

i'd have to say go with a high flow cat. It's not really worth it not having a cat, maybe it might increase hp a bit... but still, youll probably never pass emissions with it. and just think of the children!!!
just spend the extra money on a high flow

 

Just run a straight pipe and weld a cats heat shield to it.....it will look like u have a cat on your car. But my car doesn't get inspected i just drive into PA a lot and sometimes they pull people over and check for it with a mirror so that lil trick works....hehe

 

Hole's for the O2 sensor probably, from a newer car. I had mine plugged. Way cheaper than buying a new cat.