.115in Bypass Pill Main Jet

The .115in Bypass Pill Main Jet from ENDERLE is a precision fuel metering component designed for high-performance carburetor tuning and engine calibration. Built for enthusiasts and professional engine builders who demand exact fuel delivery control, this bypass pill main jet serves as a critical component in fuel injection and carburetor bypass systems. Whether you're dialing in a competition engine, restoring a classic muscle car, or optimizing fuel economy on a modified build, this jet ensures repeatable, predictable fuel flow characteristics across your operating range.

The .115-inch orifice diameter is precisely machined to ENDERLE's exacting tolerances, allowing fuel to bypass the main jet circuit at a controlled rate during idle and low-throttle conditions. This design prevents flooding, improves cold-start response, and stabilizes air-fuel mixture during transition phases between cruise and full-throttle operation. The compact dimensions (1.6 x 0.65 x 2.9 inches) and minimal weight (0.01 lbs) make installation seamless into existing ENDERLE fuel systems without adding restriction or dead volume. The hardened steel construction withstands fuel pressure cycling and resists erosion from ethanol-blended fuels over extended service intervals.

Carburetor tuners, drag racing crews, and vintage hot rod builders rely on ENDERLE bypass pill main jets to achieve repeatable baseline fuel metering before secondary adjustments. Installation requires removal of the carburetor fuel bowl or bypass system housing; cross-reference your specific ENDERLE fuel system documentation to confirm compatibility. Stock with multiple jet sizes—including this .115-inch variant—if you plan to dial in your engine across different atmospheric conditions, fuel octane ratings, or intake manifold designs. For street-driven vehicles, this component works alongside properly tuned air bleeds and needle seats to deliver smooth throttle response and improved fuel economy.