I have just stumbled across this forum and reading the whole thread It made me have a good laugh.
Kws and hp on a dyno are actually useless figures as to get the figures it's a mathematical equation worked out from your tourque speed and rpm figures.
I can say for a fact that the kits from JMM would not even come close to the figures you apparently gain.
Now to the quarter mile times, a standard xr6 back runs 15.2.
A standard ba xr6T runs 14.1.
Now whoever it was that has the JMM kit with with the apparent 180+rwkw only ran a 14.9.
A 3 tenth gain for 40 extra rwkw, you should be gaining nearly a second with that extra amount.
With the JMM kit you apparently have the same rwkw as a standard bar xr6t.
With the bolt on options in those kits you would have been lucky to gain an extra 15rwkw at the most.