Is your cat a dog?
Sonics:
Your state requires emissions testing so you need catalytic converters, at least for the test.
I would just pop for the high-flow cats and be done with it as you don't lose that much power but if you go catless (H-pipes) then just install the cats at test time and remove them afterwards. Many Mustang owners in emission testing states do this successfully.
FYI: Unless they've stopped, Walker makes a high-flow catalytic converter system for under $300.
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