ACDelco Professional Series vs. Cheap Moog Ball Joint

I bought a set of the Moog R-series lower control arms to install. The R-series is Moog's cheaper line of products that are sourced from various cheap labor countries around the world, but supposedly still meet Moog standards. The arms themselves appear to be good quality. Very beefy. I don't think I could tell a difference between the Moog arms and stock.

The Moog arms run about $115-125 per arm. They come with bushings and ball joints installed. Supposedly the reason they are so cheap is because they use cheap ball joints and bushings (and labor). I bought a set of ACDelco Pro Series ball joints to replace the cheap ones that come in the Moog arms after reading forum posts about Moog joints shearing off. The ACDelco Pro joints are Made in Japan and stamped with Three Five (Sankei?). I would guess they are the same quality as Moog K-series and Beck/Arnley joints. They definitely look nicer than the Moog R-series joints, but other than that I can't really tell a difference based on external appearance. The ACDelcos weigh 1 oz more, probably from a beefier castle nut.

A lot of people shit on Moog these days. I've talked to one other Tundra owner running these Moog arms with the Moog bj's, and he's of the opinion they are better than OEM. FWIW, I have one OEM bj leaking after ~80000.

 

Excellent - this was a big help. I was looking for a source for 555s.

I'm waffling on Moog K w/Zerk or the 555. Leaning toward the 555. In the RockAuto stock photos I noticed the LBJs for my truck appear to have a small, gold plug that maaaay be a way to make them greased (upper pic):

EDIT: It appears the Moog K also has a 555 LBJ along with the same apparent threaded plug in the hole for the Zerk (lower pic):