Advanced Engine Design 5255X Idle Mixture Screw Gaskets for Holley Carburetors, Set of 10

Restore proper sealing around the idle mixture screws in compatible Holley carburetors with Advanced Engine Design 5255X Idle Mixture Screw Gaskets. Designed for dependable service and consistent fitment, these rubber gaskets help reduce air and fuel leakage at the adjustment screw, supporting stable carburetor operation and accurate idle tuning.
The 5255X gasket set is manufactured from black rubber for flexibility and reliable compression during installation. Each gasket features a 0.125-inch inside diameter and 0.063-inch thickness, making it suitable for applications that require a compact sealing component around the idle mixture screw. Replacing worn, flattened, cracked, or missing gaskets can help preserve the carburetor’s original sealing performance and simplify routine rebuilding or maintenance work.
This package includes 10 idle mixture screw gaskets, providing convenient coverage for multiple carburetors, rebuild projects, or future service needs. The gaskets are intended for use with compatible Holley carburetors; verify the application and existing gasket specifications before installation. Advanced Engine Design part number 5255X offers a practical replacement solution for professional technicians, performance enthusiasts, and anyone servicing a Holley carburetor.

Features:

• Application: Designed for compatible Holley carburetor idle mixture screws

• Part Number: Advanced Engine Design 5255X

• Material: Flexible black rubber

• Inside Diameter: 0.125 inch

• Thickness: 0.063 inch

• Quantity: Set of 10 gaskets

• Use: Helps seal idle mixture screw adjustments and support consistent carburetor tuning