Its been awhile since I have had a boxxer in my van but
did experience the same as you Rocket Man. The best way
I can describe it is that is seemed more responsive to
the throttle than the older plugs did. A small upgrade 
over stock worth doing. 

Bill

P.S.  I also recieved an email from Busdepot that they are 
going to handle the warranty for the Maval rack. Which is
a relief on the pocket book and takes some of the sting away
from waiting so long to install something.

On Aug 21, 2012, at 4:23 PM, Rocket J Squirrel <camping.elliott@GMAIL.COM> wrote:

> Just swapped out my older Bosch W7DC0 pluggies for new NGK BP6ET.
> 
> Either tencentlife (Chris Corkin) is right: "The main reason this plug
> design so often produces palpable improvement in idle, throttle
> response, and overall performance is mostly due to the projected core,
> and that is helped by the side electrodes not "shading" the spark gap
> from the middle of the charge. The wbx has a very compact, somewhat
> "spherical" charge at TDC, as well as outstanding squish dynamics, so
> initiating flame nearer to the charge center aided by the squish
> produces a faster total burn, and fast burn is the principal requirement
> for responsiveness, efficient use of the fuel, and lowered emissions
> (especially NOx)."
> 
> <http://www.thesamba.com/vw/forum/viewtopic.php?t=327351&start=80&sid=2b4a44c5892001fb15120a77e2dd8767>
> 
> or it's the New-Spark-Plugcebo Effect.
> 
> But I definitely feel that the throttle is more responsive and the van
> peppier.
> 
> No increase in real power, of course: took the van up my neighborhood
> calibrated steep street and it didn't climb any faster. But I'm pleased
> anyway.
> 
> --
> Jack "Rocket j Squirrel" Elliott
> 1984 Westfalia, auto trans,
> Bend, Ore.