Fits GM LS1/LS6 with FAST LSX Intake Manifold. Includes Red Anodized Fuel Rails and Black Anodized #8 Fittings and with and Super Seal and O-Rings. The FAST High Flow Billet Fuel Rails feature a larger internal diameter that dampens the pulses and provides increased fuel volume, ensuring that your injectors never run dry. In addition, they yield better fuel distribution and ultimately greater horsepower. Featuring high strength billet, lightweight, red anodized aluminum construction, FAST LS1 fuel rails deliver performance in addition to a show car quality appearance. Available With Black Anodized Fuel Rails.