Idle Mixture Screw Gskt. 10-Pack

The Idle Mixture Screw Gasket 10-Pack from Holley is an essential consumable for carburetor maintenance and rebuild work on classic and performance vehicles. These cork gaskets seal the idle mixture adjustment screws on Holley carburetors, preventing fuel and air leaks that compromise idle quality and throttle response. Whether you're rebuilding a vintage muscle car engine, restoring a street rod, or tuning a classic four-barrel setup, having a reliable supply of replacement gaskets ensures your carburetor adjustments remain sealed and stable.

Each gasket in this 10-pack features a 0.125-inch inner diameter and 0.125-inch thickness, manufactured from cork material specifically chosen for its compressibility and fuel resistance. Cork gaskets conform precisely to the idle mixture screw bore, creating a dependable seal without over-compression that can damage the carburetor casting. Over time, these gaskets deteriorate from fuel exposure, heat cycling, and repeated adjustment cycles, allowing vacuum leaks that cause rough idle, hesitation, and difficulty maintaining target RPM. Holley's OEM-quality gaskets restore that critical seal with proper density and dimensional accuracy, ensuring your carburetor tuning holds across daily driving and track use.

Carburetor enthusiasts, engine builders, and classic car restorers benefit most from stocking this 10-pack, as it covers complete rebuilds or multiple carburetors without the need for repeat orders. Installation is straightforward—simply remove the old gasket, clean the bore with a soft cloth, and install the new gasket before reinstalling the idle mixture screw. Compatible with all Holley carburetors using this gasket design, these replacements pair perfectly with Holley rebuild kits and tune-up packages. Keep a pack on hand for preventive maintenance or emergency field repairs when your classic engine refuses to idle smoothly.