I haven't read this thread in a while.
I had resigned myself to the belief that the plugs won't work, or at best work marginally.
For $100 a set I am not going to try them. But, if this guy is for real, and willing to let me test them for free, I would buy them for all my cars. Provided the testing proves they are worth the money. But as you read I have an older Geo and tank 2 tank is my best offer of reasonable testing.
I gave you my take on the Splitfire Plugs
The latest and greatest of the last decade.
IMHO Splitfires were a bunch of hooey and I sent many a customer back to Auto Zone (or wherever) to get their money back.
I always gave these people enough documentation to avoid unnecessary calls and harassment from the retailers.
Diagnostic equipment with a printer is a great tool for any shop to have.
I will wait and see,
Schultz