Try and break one, let us know how strong they areSince I am so close to them I thought I would go and have a look for you. Weighing the two packages of the tt200 and tt222 (V2 shock tower version) the orignal aluminum arm item tt200 came in about 2.61 pounds. The tt222 here: http://www.davesmotors.com/tt222EFR which does in fact include a shock tower that is not in the picture came in about 2.06 pounds. That is a savings of over a half of a pound which is pretty significant. That is equally impressive to think that the new EFR arms have the dog bones diff cups AND drive axles compared to just the original aluminum armed extended dogbones only. Take the driveshafts out of the mix and these arms are probably 3/4 of a pound lighter.