cat replacement question
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Staging Lane
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cat replacement question
ok guys, got my blackbear tune a few months back, now I've got a code showing drivers side cat is bad (didn't ask my buddy the code #- he told me that's what it is). not wanting any louder than i have now with my magnaflow setup, and not looking for high $$ performance gains- just a replacement. are these thunderbolt cats i've seen online good? they seem pretty inexpensive. which size for 99 5.3?
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