Innovators West makes a very good product as does ATI although apparently some don't agree. This might be going out on a limb but I would be willing to bet those two brands are pretty much the industry standard. Don't EVER recall seeing a Fluidamper on a Comp or SS motor, well at least one that ran well anyway.
Don't forget they are engines not motors too....Sheesh
"I am not ashamed to confess I am ignorant of what I do not know."