When I picked up the box off the front porch, I Thought, "maybe this isn't the strong strut, or if it is, maybe they forgot to put in in the box!" The dang thing is super super light. I didn't bother to weigh it, but let me tell you, it's impressively light.
The performance results were phenomenal on my 2001 Z3. BMW should have included this accessory as standard equipment.
I had a Z3 with the Strong-Strut and felt that it really made a big improvement, so when I traded it on the Z4 I ordered a Strong-Strut right away. Again, there is a big improvement in steering feel.