Hey guys i have a 97 civic ex w/ like 105K miles on it, these gas prices are pissing me off and i think its time for a new cat. In a couple of months i'm planning on putting on a turbo, and i was wondering if i should go with a high flow cat. or a test pipe. Now if i go with the test pipe will that throw cel codes or no?

 

Yes. Dont do it, just leave your cat alone, it is seriously not worth it.

 

test pipe wont through a code

.... id get a high flow cat just to make everyone happy... and there basicly a test pipe...

 

Yes, it will throw a code.

 

You are going to get even worse gas mileage with a turbo setup. And it will throw a code. Leave the CAT alone.

 

So will a high flow cat work with a turbo setup.

 

Yes...but so will the stock

 

What he said.

 

realy? i guess i dont know eks that well.....

i just know on en eg it wont

 

With the obd2 theres a second sensor right after the cat. If theres not cat there, it will throw a code something like "Catalyst performing under efficiency" or something.