Rubber blocks insertes in spring coils?
 

I saw an ad about rubber blocks inserted in the spring coils. Supposed to strengthen sagging spring coils.
Anyone familiar with this?


Cheers!

I would advise against this solution.
These may indeed restore ride height and prevent bottoming to some extent, but I doubt it would do much to improve handling overall.

New front springs are only about $40 USD each over here (78.8280 DEM, 40.3062 EUR), so if prices are similar in Europe it may not be worth the trouble.

In my opinion, rubber blocks in coil spring is like a band-aid on on a gun wound. It only hide the problem, make pretend eveything is normal. No serious mechanic would ever recommend those.
jackD

The system is called 'Gopren'.

Cheers!