Does anyone have one of these things? Is it better than other ASTs or is it a gimmick? It is below the radiator in the pic. It costs 49,000 Yen.

Paste this:
http://www.sanai-d.com/watertemp/super-cool.html

Into this site for Jap to Eng translation:
http://www.google.com/language_tools?hl=en

 

not sure, the jacked up english translation makes the product sound shaddy

 

Completely unnecessary, as are ASTs.

 

I was under the impression that the reason we have an AST was because of how the radiator was mounted?

 

I didn't mean for this to turn into a "to AST" or "not to AST" debate. So here are the pertinent links for that debate from the 3rd gen archives:

Modify the 2-piece version of the filler neck:
https://www.rx7club.com/showthread.p...&highlight=ast

Which AST to choose:
https://www.rx7club.com/showthread.p...&highlight=ast

Pros and Cons of AST elimination:
https://www.rx7club.com/showthread.p...&highlight=ast

I will comment on those 3 links. If it is true that the 787b had an AST, then I am unconvinced that it should be eliminated. Also, does the RX-8 have one? They make a version of the Ginzirou for the RX-8.

Now, I do find it interesting that this thing mounts over by the ABS on the FD. This puts it at a higher position w.r.t. the stock AST. I imagine that would help to promote air bubbles moving to this AST.