Product DescriptionImprove the durability of your ET410 with this set of revised arms. The arms have been modified to accept the larger HD 3.5mm hinge pins that were introduced with the EB410.2. Not only have the arms been updated to fit the HD pins, additional material has also been added around the hinge pin area for added durability. They require (TKR6523HD) HD 3.5mm hinge pins and HD 3.5mm hinge pin inserts (TKR6544B). RequiresTKR6523HD – Hinge Pins (inner, 3.5mm f/r, requires TKR6544B, EB410.2, 2pcs) TKR6544B – Hinge Pin Inserts, Wheelbase Shims (requires TKR6523HD pins, EB/ET410) Includes2ea Rear Suspension Arms |