May rattle from engine vibration, will not pass emissions, on 96 and newer cars check engine light will probably come on, in some cases could become clocking cause significant engine back pressure causing engine to die out. Also if you have an ( optical pieromatour ) or laser thermometer, the exhaust gases coming out of a good working catalytic converter will be hotter than the gas going into it. Thanks for asking.
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May rattle from engine vibration, will not pass emissions, on 96 and newer cars check engine light will probably come on, in some cases could become clocking cause significant engine back pressure causing engine to die out. Also if you have an ( optical pieromatour ) or laser thermometer, the exhaust gases coming out of a good working catalytic converter will be hotter than the gas going into it. Thanks for asking.