The car was already equipped with a larger feed line, 1/2-inch fuel rails, and 42-pound injectors--more than enough for the baseline combination. With the addition of the heads came the need for more fuel volume. Lethal Performance shipped us a sweet fuel hat that fits '03-'04 Cobra tanks, which was in this car. Fore Performance is responsible for the design and construction of the piece, and we were very impressed. Expect more Fore Performance fuel-hat combinations to be available through Lethal by the time you read this.