Spring Kit Main Jet 3 Springs

The Spring Kit Main Jet 3 Springs (King Racing Products MPN 1960) is a precision fuel injection component designed for high-performance sprint car engines. Built for racers who demand reliability in the fuel delivery system, this three-spring set maintains consistent jet pressure and metering across varying engine loads and RPM ranges. Whether you're tuning carburetor response or dialing in fuel atomization on the track, quality main jet springs are essential to repeatability and peak performance.

Each spring in this kit is engineered to precise specifications, controlling fuel injector plunger travel and ensuring accurate needle lift timing. The three-piece set allows tuners to select the optimal spring rate for their specific engine configuration, fuel pump pressure, and fuel line routing. King Racing Products springs are manufactured to tight tolerances, minimizing variance between pieces and reducing the guesswork in fuel system calibration. The compact design (3.6 x 0.45 x 4 inches) fits standard sprint car fuel injection assemblies without modification.

Sprint car racers, fuel system tuners, and carburetor specialists rely on this replacement kit during engine rebuilds, fuel system upgrades, or when spring fatigue develops from repeated heat cycles. The set accommodates various engine displacements and naturally aspirated or forced-induction platforms common in sprint racing. Installation is straightforward for users familiar with fuel injection assembly work; simply swap worn or degraded springs with these precision components. For serious track competitors, maintaining stock springs or experimenting with spring rates is critical to lap-time consistency.