Alcohol Jet Extension 5/16in

The Alcohol Jet Extension 5/16in from Quick Fuel Technology is a precision carburetor component designed for builders and tuners running alcohol fuel systems or high-performance carburetors that demand specialized jetting solutions. This extension effectively increases the fuel delivery metering capability by lengthening the jet seat, allowing fine-tuned fuel mixture control in racing and extreme-duty applications where stock carburetor geometry falls short. Whether you're building a dedicated methanol burner or optimizing a carb for alternative fuels, this extension provides the dimensional flexibility necessary to dial in peak performance across the full RPM range.

Constructed from durable brass with a 5/16-32 thread specification, the Alcohol Jet Extension integrates seamlessly into most Quick Fuel Technology carburetors and compatible aftermarket units. The brass material resists corrosion and chemical degradation from alcohol fuels—a critical advantage since methanol and ethanol blends are more aggressive toward ferrous metals. Each pair includes a replacement bowl gasket, ensuring a complete seal and preventing fuel seepage when the extension is installed. The compact profile (measuring 4 x 1.5 x 6.1 inches) and lightweight design (0.08 lbs) make installation straightforward without requiring significant carburetor disassembly or modification beyond standard jet replacement procedures.

Serious drag racers, alcohol-burning engine builders, and performance carb tuners benefit most from this extension when factory jet steps no longer provide adequate adjustment range. Common applications include alcohol-fueled small-block and big-block engines, supercharged or nitrous-assisted builds requiring richer mixtures at full throttle, and vintage race carburetors being modernized for consistency and tunability. Installation requires draining the carburetor bowl, unthreading the stock jets, and screwing in the extensions before reinstalling standard jets—a task well within reach of any mechanic with basic carburetor familiarity. The supplied gasket ensures a fresh seal; always verify thread compatibility with your specific carburetor model before ordering.