Holley Boost Control Solenoids 557-201

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Features: Black Anodized Billet Dual Port Manifold Two 1/4?ǥ NPT Push-Lock Fittings for easy plumbing and installation Two Pre-Terminated connectors simply plug into the solenoids and pin into Holley EFI ECU connectors The billet manifold contains built in mounting provisions, setup for ?? hardware Proprietary design to flows nearly 40% more than comparable designs and up to 90% more than conventional 3-port boost control solenoids Show more