read here...
http://www.3rotor.com/jc_series.htm
stats on a 13bt Cosmos
and a 20b Cosmos
13bt Cosmos is like a 13bREW
Just better looking intake,in my opinon..
HP might be the same.
Availibilty should be easier to find..I think they go for 2k. J Spec.
http://www.rx7club.com/forum/showthread.php?s=&threadid=123341
__________________
Do you want to be tazed?