hello and thanx in advance. i just purchased this plx m-250 and need some help with the wire install. i'm posting some pix to help me understand a little better. my setup is a b20/b16 and i'm using hondata s300. i'm going to be welding in a new bung on the downpipe for the 02 and leaving the stock one in place.


there are 4 wires coming off the m-250 box
1-red
2-red/black
3-thin grey wire
4-thin white
correct me if i'm wrong, red wire is power, red/black is ground. what is the grey and white one for.
on the gauge there is the
1-red
2-red/black
3-thin white
where do i hook these up to.
any help would be greatly appreciated. thanx louie