you have staight pipe exhaust and you added catalytic converters to suppress some of the noise? either way you may want to look into why your cat has failed already. if it broken inside, its either a defect, physically damaged on the road, or some gasoline is getting into your exhaust and igniting inside the hot catalytic converter.
but i would put some kinda higher flowing mufler on to change the sound vs cats. also i heard the high flow cats are not really any higher flowing anyway. just a gimmick.
2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.