Last question I have, and I read a lot about it without a clear answer. What is the lifespan vs OE? These are not serviceable unless something has changed recently, so if one goes bad, what's the solution besides spending a chunk of $ on a replacement?
the less than perfect the roadway the greater the increase in NVH vs. OE
I don't think any of the "sealed" designs (DINAN, Synchro, Turner, GAS) will be serviceable (removeable), they all have a large surface face that eliminated the shoulder on the control arm, and thus make it difficult to press out once installed.
Moosehead Engineering's monoball is removeable, but their design is not sealed, they point that out in the product description. As far as the life of any monoball, it always depends on your type of use and your road conditions, the nicer the road surface you drive on the longer the monoball should outlast the OE-bushing
Simply put, you'll always have to replace the control arm when the monoball has developed enough wear. Which is very different from the standard control arm with a rubber bushing. On a standard arm, you can replace the rubber bushing until the ball-end shows wear and forces you to change out the whole arm. Based on the experiences found on this forum and online, people usually managed to get x2 bushings per control arm (i.e. the original that came with the arm, plus one replacement).
as far as I can tell, only member
@Fiftytwoeighty is racking up enough mileage to give some idea of the lifespan of the monoballs. I believe he has the full turner motorsports kit, but for the E60 M5.