.145in Bypass Pill Main Jet

The .145in Bypass Pill Main Jet is a precision fuel metering component engineered for carbureted performance engines and fuel system tuning applications. This brass jet is designed for users who demand fine-tuned control over fuel delivery in high-performance or custom engine builds. Whether you're optimizing a classic muscle car, drag racing platform, or precision marine engine, this bypass pill jet enables the exact fuel flow calibration necessary to achieve peak efficiency and performance.

Manufactured by ENDERLE, a trusted name in fuel system components, the .145in Bypass Pill Main Jet features a precise 0.145 inch internal diameter that regulates fuel bypass flow within the carburetor or fuel injection system. The all-brass construction ensures durability, corrosion resistance, and thermal stability under demanding engine conditions. The compact design—measuring 1.5 x 0.4 x 2.6 inches and weighing just 0.01 lbs—allows for straightforward installation in tight engine bay configurations while maintaining the structural integrity needed for consistent fuel metering over thousands of operating hours.

This bypass pill jet is ideal for carburetor rebuilds, performance tuning upgrades, and fuel system diagnostics on vintage and modified engines. Technicians, engine builders, and enthusiasts rely on precision jets like this to troubleshoot lean or rich conditions and dial in optimal air-fuel ratios across throttle ranges. Installation is straightforward—the jet simply replaces the OEM unit in the carburetor bypass circuit—making it a cost-effective solution for anyone looking to refine engine performance without extensive modifications. Always verify compatibility with your specific carburetor model and fuel system design before purchase.