WEBER 40 IDF CARBURETOR BASE GASKETS - PAIR, Dellorto DRLA$ 4.6 ‹ › ‹ › Part number: ST4089Made in: EUIncludes:WEBER 40 IDF Carburetor Base Gaskets - Pair, Dellorto DRLA These carburetor base gaskets seal the interface between the carburetor base and the mating manifold or adapter surface. They are intended for Weber 40 IDF carburetors and can also be used with Dellorto DRLA applications. The gasket opening and bolt-hole pattern must match the specific carburetor and mounting surface. Supplied as a two-piece set for one carburetor. A sound base seal helps prevent unmetered air entering below the throttle plates. Air leakage at this point can cause unstable idle, inconsistent progression, poor transient response, and difficulty establishing a reliable mixture setting. Replace the gasket when removing a carburetor if the existing seal is compressed, damaged, or no longer suitable for reuse. MPN: 2xST4059. This replacement part is suitable for carburetor service and restoration work where the original component is worn, damaged, or missing. Reference/MPN: 2xST4059. What Is Included Two carburetor base gaskets for Weber 40 IDF and Dellorto DRLA applicationsPrice and quantity: one carburetor set containing 2 piecesMade in EU. Important Fitment Note Verify the carburetor family and the marking or code before installation. Compare the center opening, overall outline, bolt-hole positions, and mounting-surface geometry with the removed gasket and the mating manifold or adapter. For applications using an adapter, also verify the interface thickness and any locating features; thread and seat style apply to the mounting hardware and should be checked for compatibility. Compare the new gaskets directly with the removed parts before fitting, especially when the Weber 40 IDF or Dellorto DRLA variant is unknown.What you see is what you getShow all parts