What is a Decat on the Evo VII? [Archive] - Mitsubishi Lancer Register Forum

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Cesarjr23

29-09-2002, 05:44

I have a Evo VII GSR 2002. I will like to change my exhaust system but I have concern on the second lambda probes?? What could I do with them??

Why many sites tells about a decat on Evo VII, could some on explain me what is it?

Regards,
Cesar Munoz

RS Sprint

07-10-2002, 13:57

Hello!

Decat means removing the catalytic converter assembly and replacing it with a straight through 3" tubing, with inlets for the oxygen sensors. The cat is the last choke point along the exhaust system when you install an aftermarket turbo downpipe and cat-back exhaust. :(

HTH! :)

NR Autosport

07-10-2002, 18:56

The 7 de-cat pipe does'nt have any fitments for the second 02 sensor as it is in the center section of the exhaust so a straight pipe will do with the ness flanges.