Post by
nametakennow »
https://forums.nicoclub.com/nametakennow-u713.html
Tue May 15, 2007 5:51 am
Midpipes don't necessarily replace the cat, in fact all the ones I know of don't. It's the only way to make a header all that useful.
To get around smog, just relocate the 2nd O2 sensor behind the cat. Unless your state has a strict visual inspection (and/or you don't get to know your inspector), you're golden.