Very pretty!

For clarification- The dyno runs were with open headers
The engine was tuned to optimize header performance gains
The headers are straightforward install on my X5
No other modifications were made to exhaust

Questions:
Why doesn't either TQ or HP fall off on dyno runs?
Why does TQ line fluctuate so much?
Is there a warranty?
Will there be a printed gain in HP and TQ one can expect on a stock 4.6?
How much is left for porting?
Do the collectors line up to the stock exhaust location?
Will there be a tune available to compliment the header performance?

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas