I have been wondering for years if the 6.7 Harmonic Damper would fit the 5.9. The 6.7 version is a viscous fluid damper, like a Fluidamper, but at about 1/2 the cost. Thanks to a TDR member I now know that they fit and what it takes. So my parts are on order, and I will update this thread when I get them installed. Benefits are a smoother motor, and generally just a better part. Initial reports are that the damping is as good as, or better, than an aftermaket damper. Low rpm lug noises are greatly diminished, as is gear roll-over on manuals with HD clutches (like the Con OFE on my truck). The swap requires the damper, fan pulley, and 4 bolts.Damper p/n 4933224 ~$227Fan Pulley p/n 4930580 ~$50Bolts (4) p/n 4937228 ~$3 ea. This is for the standard 6.7 damper, not the newer HO version. The HO version is p/n 5285679 and is ~$466, and still requires the other parts. I am not sure its twice as good as the standard 6.7 damper, especially considering the initial reports on the standard damper.

Why are not these "important' items given the special treatment they deserve???

I presume you are talking about the lack of OE balance? I was shocked, this is the same part number that is used on a 3400 rpm 480hp 5.9.

I presume you are talking about the lack of OE balance?

Yes, that is correct.

Yeah, shocked doesn't quite describe it. I would still recommend it anyday over the stock 5.9 damper, it made a big difference. But if you ever plan on balancing the motor just get the fluidamper.

I got mine last month and installed it just before I went on vacation... Love my Fluidamper!!!

The Fluid Damper I had on my 02 did awesome things on that engine, It smoothed out the lope considerably from having an HRVP44 combined with 155 hp BD injectors and Hot comp combined with a Smarty for a short time but the smarty wasn't compatible with the HRvp44 for a daily driver, One couldn't hardly drive it, throttle response was so super sensitive and jumpy even on smarty lowest settings.

At this point I am not sure what to attribute to the fluidampr, new fully balanced injectors, or the fully balanced motor.. but for the 3-4 minutes it was running earlier it is SMOOTH and QUIET!! The loudest thing by far is the vacuum pump.