I totally agree with the "Sweed" above.
I've done a lot of research in the past about carbon cleaners, and it looks like MOPAR Combustion Chamber Cleaner 13oz. is a totally different animal and many swear by it and it has a very strong following out there...its been said to be stronger than the old GM Top End Cleaner that is now discontinued.
I think I found out who makes the MOPAR CCC 13oz. for Chrysler/Mopar.....a small chemical company who private labels that I ran across who I also think makes the Yamaha-Yamalube Combustion Chamber Cleaner 13oz.
The owner of the company carefully eluded to it but would not come out and say it due to confidentially agreements with different companies.
A tech. from ATP Inc. who makes the obscure "AT-205 Reseal" (that I can say really worked on my power steering gear box leak 2yrs and no leaks) "leaked some info to me" and said the company "Smart Blend/Life Automotive" makes their proprietary formula AT-205 Reseal for ATP Inc. which is how I found out about that company SmartBlend......
Anyway, the brand label is Smart Blend Upper Engine & Combustion Chamber Cleaner 13oz #17045
http://www.lifeautomotive.com/Retail/17045.asp
The owner of the company said it will dissolve hard carbon and told me to get some old carboned valves to try it on or use a borescope. Some day I was going to go to a local head reman. company and see if they have some old heavy carboned valves to try it on.....I'll post pics if I ever do the test.
They also have another strong product called: #17020