Be careful running those mini-cats. I have seen them meltdown if the car is ran hard. When that happens the exhaust backpressure goes up and so does the manifold boost. Then your fuel pumps will have a hard time keeping fuel pressure and you will go lean! Not a happy seen.
For that matter even some OEM cats have melted down. Most often if you run the car hard and you have a tune that turns off CAT over temp protecting. The stock tunes protection tends to run very rich when the car's ECU think the cats are in danger of a meltdown.