aerayls asked a few questions a couple pages back about new parts in the B4...I received a B4 from AE today and it was on backorder for about a week, anyway, it has the new steering assembly, new spindle arms, new motor guard, new shock bodies and new shock inner plastic but does not contain the new towers or new chassis. I also ordered a spare front tower and it is the newer one. The newer front tower doesnt have the webbing on the back that interferes with the shock when using the inner hole.