ASP, Super Custom, and Magnum engines are all made at the ASP factory in mainland China.

It sounds like the Series 3 ASP line is the same as the old Magnum XL line. I've never had any major problems with any of the seven Magnum XL engines I own that weren't my own fault (e.g. I burned up a .15XL by running it too lean). $75 is a bargain!

The new XLS series Magnums do indeed have the squarish heads, like the OS FX engines. The old XLs were round and highly polished, like the older OS SF series.