Holley Blue Non-Stick Metering Block Gaskets (2) Enging Coolant Crossover Components Choose From Adapters that fit

Choose From Adapters that fit OE 5/16" or 3/8" Tube on Fuel Rails (and Other Components)

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Holley Blue Non-Stick Metering Block Gaskets (2) Enging Coolant Crossover Components Choose From Adapters that fitFor most Model 4150's, some 4160's early 4165's and most 2300's. Secondary metering block gasket on double pumpers. Not used with accelerator pump transfer tube. Used for 4500's without intermediate idle system. Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro Stock champion for four decades. Now, Holley EFI products power these cars and are dominating