ok so here's how i bring this back on topic ( not that I really care)...
Here are pics of the prototype installed on a BONE STOCK 99' P11.
The header is very very close to the oil pan so I will be moving the runners over about 1/4-1/2" towards the crossmember.
I will be modifying runner #1 to better clear the A/C line.
I will be making runner #2 longer to match the other 3
Ground clearance wise on a P11 (P10 the same) this does fit above the cross member.
For B13/14/15 guys, this header will fit above the stock crossmember so you will not have any issues at all.
You DO NOT have to remove the radiator fans (on a p11 atleast) to install this header
You have to either unbolt the A/C compressor and or unbolt the front part of the crossmember to install the header.
I will not make a final assembly jig until after I dyno because of a few possible changes that I may do.