I have decided to stop messing with my acura and focus on my civic. Civic has been sitting because a lack of funds, but now I live back with parents, so no rent so I could use my money on usless BS. But before I can do anything to my Civic I must get pass the Smog Check here in Cali. This involes putting back in my Sohc motor, and I am rounding up parts so I could get it smoged, just bought a new oem clutch (traded my old tranny to my sis, and took here failing one, old clutch got thrown away). Next I need a cat for it. But have a few questions. Will a highflow work for Cali Smog? Also would you trust one from the junk yard? Or a used one? Would a OBDII cat work as long as I plug the second O2 tap?