X-Pipe (Cats vs Catless)

[Mr 5 0]

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.