can any one read what this says
 

http://www.revo-tune.com/hyper/rx-8.html
what is that piggy back unit

Original Computer

New!
Torque Up and Response Up you can really feel!!

A-Type: Limiter cut (~$400 USD)
B-Type: Limiter cut + original data (~$850 USD)

It goes on to talk about how you can customize the settings for different parts you have like muffler, air cleaner, etc.

thanks wounder if its better then cz's???

that looks like the OEM computer.

Its probably a reflashed OEM computer, and not a piggyback like CZ's.

Yep yep yep... that is what I told someone else that PM'd me about that CPU. Many of the Japanese tuners appear to be merely reflashing the stock ECU (RMagic is another, and I think Knight Sports is too... not sure though).

Even though you can get the CZ unit in a fully-programmable model, if you want something else, then go eManage. MazdaManiac already gives everything you need. If wish the wires were more plug and play... I think that is coming soon, as they are building a turbo kit for the RX-8.

CZ is an emanage with the plug and play wires.

Will the eManage software work with it?

Yes.