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A small piece of hardware that's often overlooked is the pump shooter screw. Any time the shooter size goes beyond 0.040-inch, it's wise to add a hollow shooter screw kit. By using a hollow screw, you've insured that the limiting restriction in the accelerator pump system is, in fact, the shooter, not the screw. Holley sells hollow screw kits; the part number for the screw is 121-7.