FAST LSX/LSXR/LSXRT 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 or black (specific applications) anodized aluminum construction (does not include Part 146020-KIT or Part 146021-KIT), FAST fuel rails deliver performance in addition to a show car quality appearance.