Pre-cat modified Y-pipe

:confused:
Hey people.....please, correct me if I'm wrong, and save my soul from ignorance.....
Does the Japan 1997 Primera come with a pre-cat in the y-pipe? I'm assuming it does, given the population/sq. mile.
Has anyone developed any sort of system on a y-pipe to bypass the pre-cat once the engine has heated up sufficiently? It should exist, because it won't be too hard to do, especially since I know that someone (GReddy?) has developed a similar bypass system in their muffler.
:help:

Please enlighten me!!!

Hi

I have a 98 primera from japan.
the car do not have the pre cat.its ony one in the midle of the car,no EGR .

:ylsuper
Thanks! That's good to know.

But just for academic purposes......
The G20 does have the pre-cat, right? So, is there any bypass system developed?

Sorry ,but I do not know

but I guess not.