Do you mean 415 chain? Can you please post or PM the thread link? I googled 415 chain on this site, and there were LOTS of old threads.
I have one of these, but haven't installed it yet (can't fit with current cog installation) but it is heavy, and the rollers don't flop around. The side plates are THICK. http://compare.ebay.com/like/2808204..._lwgsi=y&cbt=y
KMC 415H dirt jump chain, 22$USD
$13, maybe free shipping, http://www.ebay.com/itm/NEW-BMX-Chai...#ht_607wt_1187