I've got a slight 'clunk' in the front passenger's side when going over small bumps. I haven't diagnosed what the problem is, but after researching here, I'm pretty sure it's the sway bar/bushings. I read that the MOOG's are superior as they allow a grease gun injection periodically, but what about the NAPA's or Duralast from Autozone?

 

More than likely it's your sway bar end links not the bushings.
Not sure who makes them for Napa but the Moog ones are very cheap
Even cheaper If you go through rock auto.com

 

for some reason I'm not seeing them on RockAuto...
*edit* n/m, found it

 

what year..?/ how many miles..?? makes a difference. also consider the REAR (front) control bushing.........replace with a MOOG as well as the sway bar end links(MOOG also...greasable) as well as some new sway bar bushings(i replaced the stockers with ENERGY SUSPENSION urethane ones but MOOG ruber ones would be ok)..........should be the "fix" somewhere in there....