first off, these were exhaust valves not intake valves, 09+hemi But not a huge deal was just buying for next engine build truck not down.
that being said part# EV290 from enginemach seems to be decent quality. weigh 88-90 grams, slightly lighter then stock.
seem to be nice and true, valve face looks to be close to same as oem so no real compression drop. magnet does get attracted to them like oem. so close to same material? better quality overall then some other ones i have bought in the past.