Exhaust and Catalytic converter questoins...

[395drg]

Hey yall,

I got my tc about 6 months ago, and I love it! So far I have the TRD exhaust, AEM cia, lowering springs, short shifter, and rear sway bar...Im looking within these next 6 months to get an engine torque damper, 4:1 dc header, and the greddy ti-c exhaust and a new s-pipe. My question is if i get the greddy cat back exhaust and s-pipe along with the headers, would i still have my catalytic converter? so i can pass the inspection test.

Thank you

[bwood87]

No, the cat is located where the headers would be going. You can replace everything except the headers and still be leagal.

[395drg]

what about the second cat in the mid pipe can I get a new mid pipe and not have that and still be legal?

[JRBRUIN7@aol.com]

Since our cars have two cats im almost positive you would be safe if you replaced that one and kept the one near the header, not 100% sure though, can someone else confirm this?

[bwood87]

You would be good. The O2 sensor is right after the first cat and that is what they use for the inspection.

[navylife59]

Yes, without the primary cat, your hosed if your state does an actual inspection for exhaust components. With the newer OBDII and CAN compliant vehicles, it is a given that their will be 2 sensors (AFR/O2) with a catalytic convertor between them. The secondary cat is in the mid-pipe and only serves as a backup to the primary. Removing this from the mid-pipe should not change your emissions by much at all and MAY OR MAY NOT pass your state's inspection. In Texas, some counties just look for a closed exhaust with a catalytic convertor intact so the secondary suffices.

[pwee08]

basically its illegal to do it in many states but i have it done i just have a straight mid-pipe and cat back magna flow and it sounds amazing doesnt sound ricey at all one bit