I need lot of help here. POs, and there were many, have made mods that I have no understanding of.
Here are some pis:

Overall Engine. Sorry for the lousy iPad pics...

"A" is the emmision?
"B" and "C" are sensors?
"D" is a performance part?

"F" has to do with heat?

"G" and "H" are just better pictures of the sensors. The longer wire is connected to the closer sensor and the shorter wire isn't connected at all.
Any help with the letters would be appreciated. I haven't taken pics of the serial numbers yet, but will.
Thanks and enjoy the weekend,
CCucchi