K-Jet .086

The K-Jet .086 is a precision-engineered brass main jet designed for carbureted fuel systems, specifically engineered to optimize fuel metering in high-performance engine builds. As an experienced mechanic, you know that jetting is critical—it directly controls the fuel-air mixture and dictates whether your carburetor delivers peak power across the RPM band or leaves horsepower on the table. The K-Jet .086 addresses this with a specific orifice size (.086 inch diameter) that suits mid-range displacement and tuning scenarios where stock jetting falls short.

Manufactured by Kinsler, a trusted name in carburetor internals and fuel system components, this main jet is machined from high-grade brass that resists corrosion and wear in ethanol-blended fuels. The .086 diameter orifice allows a controlled increase in fuel delivery, making it ideal for carburetors experiencing lean conditions at cruise or load. Unlike generic jets, Kinsler's precision tolerances ensure consistent flow rates, eliminating guesswork during baseline tuning and reducing the need for multiple test-and-fit cycles on the dyno or street.

This jet is most beneficial for restorers, street rodders, and performance builders running vintage Holley, Edelbrock, or similar four-barrel carburetors on naturally aspirated engines. Install the K-Jet .086 if your baseline carburetor is running too lean (black spark plugs, hesitation under load, or stumble off-idle), or if you're stepping up from stock displacement and need richer fuel delivery without a complete carburetor swap. Always verify your carburetor model accepts removable main jets, and cross-reference jet sizing against your engine's displacement, ignition curve, and intended RPM range for optimal results.