cat converters

[1 2 NV]

what will happen if i put an exhaust on my tundra and delete the cat or cats? on my civic it through a CEL. i dont want it to do that on the truck. thoughts?

[jsntundra]

i gutted all four of my cats and bought from URD o2 simulators and i have no check engine light.

[1 2 NV]

jesus, that was stupid of me. i totally forgot about o2 simulators.
the only problem i see with that is with a simulator how does the ECU compensate for the lack of a "real reading."

[Mr. Creosote]

The main (front) O2 sensors must remain in place after all four cats. The rear O2 sensors only monitor emissions performance and do not affect the air/fuel ratio beyond setting the CEL if there is a problem. It is these rear O2 sensors you would use the simulators for when you remove them.

[1 2 NV]

thank you for the info. looks like i better start ordering my exhaust pieces.

[mjgoug]

What kind of exhaust to your replace your stock ones with after removing the cats? Was there alot of welding or just bolt up? How has the performace increased?

[mjgoug]

1 2 NV, have you had a chance to finish your tundra? Could you post some pics if you have them.? Thanks!

[RobertT3]

I had my rear cats gutted only..with JBA Headers @ Sport Corsa this thing is Sreaming!!