idk anything about what quality of steel TG uses or what country it comes from. the fact still remains that most of their springs bend, break, sag, wear out and all around generally suck! Two of my buddies made the mistake of putting them on their rigs and they bent and sagged within a few trailrides. I'm not here to say everything tg makes is garbage, because there are some products I would buy from them, but leaf springs are NOT one of those products!
OME or custom built Alcan springs are the best aftermarket stuff you can buy. otherwise just run the stock Toyota stuff! Why get rid of the quality parts that are already on our Toyota's?