O-Rings

Holley O-rings (part number 26-37) are OEM rubber seals engineered for Holley 4150, 4160, 4165, and 4175 carburetors. These transfer tube o-rings maintain fuel system integrity on classic carburetors used in street performance, hot rod, and restoration builds. Supplied as a pair, these old-style seals prevent fuel leakage at critical transfer tube connections where fuel pressure and vibration demand reliable sealing.

Transfer tube seals are wear items that deteriorate under prolonged exposure to fuel and temperature cycling. Over time, ethanol-blend fuels and heat cause rubber compounds to harden and lose elasticity, leading to weeping or dripping at the transfer tube junction. Replacing worn o-rings restores a proper seal without requiring carburetor disassembly or expensive overhauls. These Holley-spec seals are sized and formulated specifically for the geometry and material compatibility of 4150-series carburetors, ensuring reliable fit and performance.

Carburetor maintenance specialists and hot rod builders routinely stock o-ring kits for Holley 4150 and 4160 platforms because fuel seals fail predictably during storage, seasonal use, or high-mileage driving. Whether you're troubleshooting a fuel drip on a classic muscle car, restoring a vintage street machine, or refreshing a fuel system before a racing season, this pair delivers the correct OEM geometry and material specification. Carburetor rebuild kits often include these o-rings, but purchasing them separately allows targeted repair without buying a complete gasket set.

The Holley 4150/4160 platform remains the standard foundation for performance and restoration carburetors. Keeping OEM-equivalent seal components on hand ensures you can address fuel system leaks immediately without guesswork or compatibility risk. These o-rings are essential maintenance stock for any shop or enthusiast regularly working on classic Holley four-barrel carburetors.