-3 Single Out Vent Adapters (One Pair)Another first from Earls are the adjustable LS steam tube adapters. The original GM brazed vent tube manifold does not take into consideration the aftermarket intakes and accessories we put on our performance vehicles. Replace the rigid hard lines with these adjustable outlet, O ring seal adapters that converts to 3 or 4 AN plumbing. Earl's Steam tube adapters are the most adjustable and lowest profile available. These adapters LOOK as nice as they