on the vortech kit (haven't got it yet), which part of the oil pan gets tapped? it cause i have a friend that works a infiniti and he can get me parts at his cost (only 55 dollars for the bottom and 80 for the top). so, i was just going to buy a new oil pan, but he called me back and told me that there are two pieces (top and bottom pieces) which one do i tap? he also told he it might not work on my car but, told him it was the same motor.

 

You want to tap the upper part...above the oil fill level