Secondary Metering Plate Gasket

The Secondary Metering Plate Gasket (HLY108-27-2) is an OEM-level replacement component designed for Holley 4160 carburetors, a platform trusted by carburetor rebuilders, vintage car restorers, and performance engine builders worldwide. This gasket seals the secondary metering block assembly, preventing fuel and air mixture leakage that would compromise idle quality, throttle response, and overall carburetor tuning stability. Whether you're rebuilding a classic muscle car, restoring a street rod, or maintaining a precision-tuned drag racing engine, a worn or damaged metering plate gasket directly impacts engine performance and drivability.

This gasket is manufactured from composite material at 0.031 inches thick, a specification engineered to provide optimal compression and sealing integrity under the thermal and pressure cycling experienced in secondary fuel circuits. The composite construction resists fuel saturation and heat degradation better than traditional paper gaskets, ensuring consistent carburetor function across extended driving sessions and varying ambient temperatures. As part of the metering block assembly, it directly interfaces with fuel inlet passages and calibration jet channels, making material quality and dimensional accuracy non-negotiable for proper fuel metering and secondary stage engagement.

Technicians and enthusiasts restoring or repairing Holley 4160 carburetors will find this secondary metering plate gasket essential during full-kit rebuilds, carburetor reconditioning, or when addressing lean/rich running conditions traced to fuel circuit leakage. The pair configuration accommodates dual-carb setups common on high-performance applications, making bulk replacement economical for serious builds. Installation requires only basic carburetor disassembly knowledge and careful attention to bolt torque sequencing to avoid overtightening, which can compress the gasket unevenly and compromise the seal.