SH motors are excellent motors . They make the xtm 24/7 , 24/7pro, mach 26, gs 25, sh28, and many many other motors these are just some of the most popular.
I think there made in taiwan, and i think the companies name is Golden lion.

These motors are extermley easy to tune, very powerful, durable, and pretty dare inexpensive for what you get!

In my opinion when it comes to big block power you cant beat an sh made motor!!!!!!!!!!!!!!!!!