Needle & Seat (Spring Loaded)

The Needle & Seat (Spring Loaded) from Holley is a precision fuel system component designed for carburetor fuel bowl regulation and overflow prevention. This specialized assembly is essential for vehicle owners, mechanics, or enthusiasts working with Holley carburetors, whether restoring a classic muscle car, tuning a street rod, or maintaining a high-performance engine.

The needle and seat assembly directly controls fuel delivery to the carburetor bowl, making it critical for proper engine operation, fuel economy, and overall reliability. The spring-loaded design ensures consistent sealing pressure and responsive fuel shutoff when the bowl reaches the target level. This mechanism maintains even contact between the needle and seat surface, reducing fuel leakage, vapor loss, and flooding—common issues with worn or damaged assemblies.

This needle & seat replacement is ideal for anyone experiencing carburetor flooding, rough idle, fuel spillage, or performance loss linked to fuel bowl regulation issues. Built to Holley's OEM specifications, it is engineered for durability and precise calibration, allowing your carburetor to maintain accurate fuel levels across varying engine speeds and load conditions. The compact, lightweight design makes installation straightforward on existing Holley carburetors without requiring structural modifications.