Originally Posted by dynamicS
Wow I didn't know there where 4? I thought those two small cans at the back where resonators?
Anyways, I'm just removing the two up front at the exhaust manifolds, and then removed the one factory pipe that's oval shaped and flattened out.
How does it sound with only two Cats removed?
Don't forget that there are 4 O2 sensors too. You may be able to use the signal from the simulator to feed all 4 but I think you may end up with OBD codes being thrown since the sensors either side of the CAT are looking for a differential to determine efficiency. You definitely need to keep the heaters connected like the schematic shows since the ECU checks for heater function and O2 signal, and you get a separate code thrown respectively.