Hey, the threaded aluminum shocks are only good for show, sometimes if not properly installed, they can cause your electronics to glitch. If you are a hardcore racer, if they bend your pretty much screwed and have to buy the whole new shock set. If it is plastic, then usually one part on it breaks and it is way cheaper to replace. This is what I think of them.
I don't know if you race or not but I wouldn't suggest getting those.
Just my .02. Does anyone else agree with me on this?
Hope this helps
Peter