K-Jet .048

The K-Jet .048 main pill by KINSLER is a precision fuel system component engineered for carbureted engines requiring exact metering control. Designed for high-performance and racing applications, this brass main pill serves as the critical orifice that regulates fuel flow through the carburetor's main circuit. Racers, engine tuners, and performance enthusiasts rely on main pills to fine-tune air-fuel mixture delivery under varying load and RPM conditions, making accurate sizing essential for optimal engine response and fuel economy.

The .048-inch inside diameter (ID) opening on this K-Jet main pill provides a specific fuel flow rate calibrated for engines requiring leaner or richer mixture adjustment. Constructed from durable brass, the component resists corrosion from ethanol blends and maintains dimensional stability across temperature fluctuations typical in high-output engine bays. The compact 2.55 x 0.25 x 4.25-inch profile allows seamless integration into standard KINSLER carburetor housings, while the minimal 0.02-pound weight ensures negligible impact on overall fuel system assembly mass.

Carburetor tuners and engine builders benefit most from stocking multiple main pill sizes to dial in precise fuel delivery for different engine configurations, fuel types, and boost levels. Whether calibrating naturally aspirated street engines or competition fuel systems, the K-Jet .048 main pill provides repeatable, measurable flow control. Compatibility extends across KINSLER fuel systems and comparable carburetor platforms using standard brass main pill housings—verify your carburetor model against KINSLER specifications before installation to ensure proper fitment and maximum tuning effectiveness.