Why dont you get long tubes? If you ever plan on a supercharger you will want the long tubes, plus they sound amazing. My friend has them with a catted H and roush side exhaust, best sounding mustang I heard in a while. I will soon have them with a catted X and magnaflows.
I would if i could. But since I'm moving to Ohio(Lorain county) later this year, If I go with long tube, I'll never pass sniffer test. or Visual for that matter
Most area would be okay with 2 cats. Here in NY for instance(exc. NYC), i can get my car pass witout cats at all. some requires some cats. Some area, like where I'm moving to in ohio, if car came with 4 cats, then must have 4 cats. and it have to be same distancve from engine, otherwise will fail the sniffer test, because farther away fron engine, slower cat lightoff....