.025in Bypass Pill Main Jet

The .025in Bypass Pill Main Jet by ENDERLE is a precision fuel system component engineered for high-performance carburetors and fuel metering systems used in racing, marine, and specialty automotive applications. This bypass pill serves as a critical restriction element that controls fuel flow through the bypass circuit, ensuring proper jetting and fuel distribution under varying engine load conditions. Operators and technicians who demand precise fuel control—whether in competition drag racing, off-road performance builds, or marine power systems—rely on ENDERLE jets to fine-tune carburetor response and maintain optimal air-fuel ratios across throttle ranges.

The .025-inch orifice diameter of this main jet is sized to deliver exact metering precision, allowing fuel to bypass secondary circuits and maintain stable idle and cruise characteristics. ENDERLE's bypass pills are manufactured to strict tolerances, ensuring consistent fuel delivery without degradation or variance between units. The compact 1.55 x 0.5 x 2.8-inch form factor allows direct integration into ENDERLE carburetor bodies and compatible Holley and other modular fuel system platforms. At just 0.02 lbs, the minimal weight ensures no negative impact on fuel system dynamics while the precision brass or steel construction resists corrosion from fuel additives and seasonal storage.

High-performance engine builders, drag racers, and carburetor tuners benefit most from stocking multiple jet sizes, including the .025in bypass pill, to dial in precise fuel curves during dyno testing and track validation. Installation requires removal of the carburetor bowl or fuel bowl and jet housing—a straightforward procedure for technicians familiar with carburetor service. This jet is compatible with ENDERLE carburetor assemblies and select Holley four-barrel carburetors equipped with ENDERLE fuel metering blocks. Backup jets in various orifice sizes ensure you can quickly adjust jetting without delay between tuning sessions, critical when chasing optimal performance at the drag strip or off-road circuit.