Xpress XP-10599 Hard Strong Composite Rear Upright 2pcs
New and improved suspension plastics - these will be direct upgrade also on the Execute XQ1 series. During testing it was found that these suspension pieces gave more corner speed! These hard versions are ideal for competition use to maintain optimal geometry under extreme conditions. If you are upgrading from the old set of suspension arms, you will need to purchase the 3.0mm outer suspension pins as well (XP-10602).