Earl's LS Steam Tube Kit w/Speed FlexSteam Vent Adapters & kits. They are designed to eliminate trapped air and steam from your engine to prevent hot spots or overheating. The complete kits are available to plumb your LS engine and include the appropriate hose and hose ends to make installation a breeze. These kits are more attractive than the OE (Original Equipment) rigid hard lines and provide flexibility when using aftermarket intakes and other accessories on performance vehicles.