Supertech products are mainly manufactured in Argentina or somewhere in S.America. BC stuff unless noted is overseas (China).
Supertech 2035-2022 are actually 93lbs on seat and the H1022D are 123lbs on seat. I have seen the 2035-2022 used on n/a and turbo apps with pretty aggressive cams like the 184-Cs and 184-T's and have been fine. No premature rocker wear or binding. The H1022D has been used in turbo apps with no seen issue before although I have witnessed a few that have had slight rocker pad wear but not sure if it was all due to the cam or just wrong adjustments. I have no idea why Supertech even came out with the 138lbs, that super aggressive.