Ran my VR12+ on my Mega DSII and Palmaris PR12 this weekend at the 1st round of the nats and have to say it makes the other pipes look stupid.
I found it to have a much broader powerband and was definately better on fuel consumption.The pipe is strong and took a lot of punishment.
My JP and Mega pipes are relagated to spares.
On my PR12 found the engine response on the bottom was much better than the JP2620 and seemed to run smoother through to top end.
Very happy with it