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Would this be a good CAT for my NEW 2.5"? Or does it have to be a Hyundai and/or Universal?

 

test pipe

 

spend an extra 10 bucks and get a carsound cat,...
its the BEST in the market and its universal

 

I would say Random Technologies (no affilation with me) are the best cats, but they are also the most expensive.

The CarSounds are the best for the money.

Those OBX cats you linked to are stock replacement units. No performance gain in going for a stock replacement, unless your cat is clogged.

Wait till you get headers or a turbo, then replace your stock cat with a 2.25" or 2.5" high flow cat from CarSound or Random Technolgies. Otherwise, you are just wasting your money.