Can someone explain the stages of a z20let exhaust, from the engine through to the back box.
I am hoping to get a ss made for it and want to know what i am talking about before i ring them
I no there are 2 cats on them and have been told you can only remove 1 of them as removing the other one messes the ecu up.
i have a irmsher back box on at the moment.
thanks for any info