I found a rx-8 owner in .jp that used this product to improve the throttle response of the DBW throttle. it sounded like he could adjust the idle also?

http://minkara.carview.co.jp/userid/...314/parts.aspx

http://www.siecle.co.jp/products/trec.html

 

Interesting in the sense that it appears to show a performance increase from their data. However, you have to take that with a "grain of salt" as they are selling the product.

This was debated before and many thought it is was just the equivalent of stepping on the gas pedal harder. However, being able to adjust the idle (which is hard to tell if that's true) and better 0-60 and 1/4 mile times would make it worth while (if true).