Bilstein Heavy Duty HD Shocks Z4M

[S2peed]

Hi guys,

I have Eibach springs with factory shocks. I really don't like how harsh the BMW shocks ride. These Bilstein Heavy Duty seem to ride better without sacrificing performance.

Coilovers are too expensive right now plus I already have springs so I'll just need to add some shocks. Does anybody have experience with these shock???

Thanks!

[F360C]

Originally Posted by S2peed

Hi guys,

I have Eibach springs with factory shocks. I really don't like how harsh the BMW shocks ride. These Bilstein Heavy Duty seem to ride better without sacrificing performance.

Coilovers are too expensive right now plus I already have springs so I'll just need to add some shocks. Does anybody have experience with these shock???

Thanks!

A Z4 MR guy that had these on bimmerforums and I came really close to buying them from him but when I thought about it this was just a stop gap solution for me cause I would have eventually ended up buying coilovers anyways.

[nickpapa]

from what i know about bilstein shocks from previous cars, the heavy duties are made to mate with stock springs. if you were to use lowering springs (such as the eibachs), the bilstein sports are recommended as they have a shorter shaft and it wouldn't bottom out. valving on both HD and sport are the same. just the shaft length is different to compensate for lowering springs.

the harsh ride youre experiencing with the stock shocks are probably because the shocks are shot and are bottoming out. similar to what would happen with HDs as well

[F360C]

Originally Posted by nickpapa

from what i know about bilstein shocks from previous cars, the heavy duties are made to mate with stock springs. if you were to use lowering springs (such as the eibachs), the bilstein sports are recommended as they have a shorter shaft and it wouldn't bottom out. valving on both HD and sport are the same. just the shaft length is different to compensate for lowering springs.

the harsh ride youre experiencing with the stock shocks are probably because the shocks are shot and are bottoming out. similar to what would happen with HDs as well

I can't remember if this guy had the HDs now or the sports. I'll have to check and see if I still got his email and maybe I can see what springs he was running with them. My stock shocks are pretty much on their way out after 36,000 miles of track, autox and street driving through NJ/NY and Canada

[blender]

i researched these too. Bilstein lists them as type "b6" and "sport" on their own website, but the part numbers are for heavy duty shocks with standard ride height, NOT 'sport' shocks with lowered ride height. Confirmed same with Tirerack phone support. Others may know differently?

[S2peed]

I gave up on these as I reached Bilstein and they confirmed it's for factory springs. Also they don't ride smoothly according to some reviews.

I end up buying Coilovers to resolve my situation which for Z4M owners seems like the only option.

[crumb]

Do coilovers improve the ride? I have some bad roads in my area. Any downside to coilovers?

[S2peed]

Originally Posted by crumb

Do coilovers improve the ride? I have some bad roads in my area. Any downside to coilovers?

Sure does. . TCK coilovers you can adjust rebound & dampening, you can also choose a spring rate that works you. In your case 300-500 spring rate for a comfortable ride.

[crumb]

Are those the ones to get? What brand is best and where can one find them?

[blender]

Originally Posted by crumb

Are those the ones to get? What brand is best and where can one find them?

go here and read, grasshopper.

[crumb]

Thanks for the link - saw that already and was hoping for more experiential info.