Hows it goin guys,

I'm currently running an itr 4-1 header with a gutted cat on my ek with an b18c obd2 gsr. car was running lean so i just replaced the o2sensor and added the sensor extender and i tell you, it does save some gas. But anyways here is my question. i live in chicago, so there is emission smoke test. What should i do when i have to get it tested? i think i should replace the cat but does the headers have to be put back to stock also?

 

You should be fine keeping your header on, but i would definitely get a cat because you wont pass without one for sure.

 

get a hi flow cat and call it a day

 

koo thanks for the info...

 

Im looking at 1 on ebay, debating on this OBX one

http://cgi.ebay.com/ebaymotors/OBX-H...Q5fAccessories

or a magnaflow 1

 

Carsound?

 

yea they did a test it was between a stock cat a hollowed cat and a straight pipe and they actually got the most power out of the stock cat cutted cat went down 3HP and straight pipe was -1HP

 

loud as hell. doesn't sound to good @ low rpm's but at high and vtec its sound sweet.