Shock towers are RPM, along with the front arms. Rear arms didn't break yet. :) Bulkheads are FLM along with the skid plates. The shocks are ebayed from Hong Kong, think it said boomboomracing. Picked the shocks for the looks but am actually really impressed with how they perform. I only have the stock ones to compare them too, but it is really difficult to roll now, which amazed me.