just wanted to check and see if anyone can help me figure out what my problem is for failing. I passed everyting except the NOx part. the amount allowed is around 600 and i got like 1600. the guy at the smog placed said it most likely is the factory CAT. does this sound right. im running greddy headers, greddy sp2, aem CAI. those all have CARB EO#. any help wuld be much appreciated. if it is the factory cat and anyone has one around that can pass smog please let me know thanks.

a cat costs less than $50. Not worth the effort to 'borrow' it and have to install/deinstall it. Just get a new one.

Thanks. Now after doing some more research i am going to try a magnaflow cat the 91005 universal cat and also replace my egr valve setup than go get re-tested and see if i pass. Any other suggestions anyone could possibly have im open to ideas. Thanks.