You keeping AIR? Keeping the cats? you would need to get a cutsom y made with cats, or modify the pacesetter y to put cats in it. If you dont keep them, then it will all need to be tuned out. Which it would be smart to tune if you're putting headers on anyways.
if you do go with pacesetters. I suggest that you buy the uncoated ones and send them to
www.jet-hot.com because pacesetters coating is absolute crap.