I've tried to look up some of this on DSMtalk's FAQ's but it seems a little over my head.
If I get a 3 in. turbo-back exhaust custom bent for me, do i need to buy an o2 eliminator also? What exactly is an o2 elimator? Here's probably the dumbest part of the question: if what I'm doing is eliminating the oxygen sensor why is it so darn expensive?