FM downpipe. Stainless steel anyway, and had flyin miata engraved back at the tip of the cat back. The cat itself looks oem though, lots of rust on it.
Edit: Actually, no, the front o2 is in the oem manifold. FM2 will move it to the downpipe. That install will be a few weeks, after my track event.
Edit: O2 swapped. Fighting with the center console now. can't get the window switches out to get the last screw....
Edit: Got most of the center console up, but found that the aftermarket heated seats don't have any disconnects within ~12 inches of the switches, so that is restricting how far I can move the center console. Probably will need to wire in some disconnects.
My new problem though is trying to figure out how I can get the hydra cable from the OEM ECU location to behind the glovebox. I can see 3 different routes through, none of which are big enough for these huge connectors. I'm tempted to just lay the cabling across in front of the base of the radio just up from the shifter, but that's tacky, risky, and might leave me too short of cable.
Searches for Hydra install info is coming up dry, apparently I'm either missing something big or something the prior owner did filled in gaps. I don't know....
Also tempting to install the Hydra under/behind the driver's seat. Under might be safe enough from theft, but I'd worry about getting caught out with the top down, or a top leak, and having the Hydra get water damaged.