@ Whomsoeva it may Concern (Bhai),
M13A is an advancement oVer G13B and Not the G13BB.
The JDM Spec M13A Can Pump as much as a Hundred Horses out !!! Just like the Legendery G13B which came in Swift GTi'z
To Better understand G13B i would suggest muneerahmed Bhai, That you visit the Following URL :-
https://www.pakwheels.com/forumreply_az_TopicID!14194~ForumID!10~pw.html
R3GAR|)s.