SPEEDMAX... PERHAPS my view is arriving from the other side of the Sports Car Enthusiasts spectrum... but as several owners have stated, the max price your looking for (15k) is daunting... it is approx 1/3 of what a new XF model is bought at.

VIC... i do see your version at the asking projected price making it under a few fortunate XF hoods... and those XFs fortunate enough to receive your seroidalesque boost, would the max price include the peripherals also mentioned... ecu adjustments... brakes... clutch... my thoughts come from frame support and possibly engine and tranny mounts would also need tending to since the load factors on them.
will be outrageous... hmmmmmm...

However, i for one appreciate your need to involve us XF owners for feedback and our appreciation to SPEEDMAX to ALLOW us to sneak-peek stage by stage your project. Have you guys completed projects like this before on other cars and if so what were the dyno results (before & after)?

i for one am glad your in NJ as i am in NY and would love to see 1st hand the passion your putting into the XF!

also don't get discouraged if your projected pricing is not appealing to the masses yet. how i look at it, all the time / effort and experience your putting under that hood will allow you to produce other... smaller tricks for the XF at a fraction of the cost and this is where you will get VOLUME.

good luck
j.