I have the stock manifolds. I'm in Texas. S.W of Houston.Do you have the stock exhaust manifolds? If so, I would try to return to the original catted H pipe if you need the cats. Where are you located, I have my original one I could sell.
It depends on what the state's requirements are. If the state in question does a visual inspection? they can legally fail the vehicle if they can determine the OEM mid-pipe has been removed or changed. There's also no guarantee that high-flow cats will pass the OBDII emissions test, especially those with 200-300 cells per square inch due to their higher flow rates over the stock cat's 600 cell per square inch. Personally, I really don't think that just plumbing in a pair of high-flow cats will be enough to pass the OBDII emissions test without adding a pair of spark plug non-foulers to the rear 02 sensorsI'm assuming that you have an offroad midpipe, so you could just plumb in a pair of high flow cats e.g. Pypes in the same location that the stock cats would have been. Then you'd pass the inspection and emissions.
That's why I'm trying to find the stock pipe with cats. I can do the nonfoulers too but rather have the stock pipe for the smog test.It depends on what the state's requirements are. If the state in question does a visual inspection? they can legally fail the vehicle if they can determine the OEM mid-pipe has been removed or changed. There's also no guarantee that high-flow cats will pass the OBDII emissions test, especially those with 200-300 cells per square inch due to their higher flow rates over the stock cat's 600 cell per square inch. Personally, I really don't think that just plumbing in a pair of high-flow cats will be enough to pass the OBDII emissions test without adding a pair of spark plug non-foulers to the rear 02 sensors