Overdose Alum. Bumper Type-2 - BlackOverdose (#OD2945) Alum. Bumper Type 2 Black Feature: For: Overdose Chassis; Universal Parts Introducing the Aluminum Bumper Type 2. A more aggressive and sharp winglet design inspired by the Weld FR S front under panel. Lightweight finish about 16g, which is about 35% less than previous model. This is almost the same weight as the standard plastic bumper and bumper support, so you can install it without worrying about the weight balance of the