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Starting with the recently released Holley® HP Series Carburetors, JET takes them to their maximum potential for the ultimate 4150 race carburetor. Venturi size is increased by .030 and throttle shafts are trimmed and radiused for the ultimate airflow from a standard flange carburetor. The metering blocks are fully blueprinted, balancing main well volumes, optimizing the emulsion system, idle circuit calibration, power valve circuit sizing and high speed calibration to precisely match the specifications of your motor. Delivering the ultimate fuel curve and fuel atomization for maximum horsepower and torque, plus unmatched throttle response and consistency. When you want the ultimate 4150 series carburetor for your pro street or race vehicle, the JET Stage 4 HP is it.
Our Throttle Shaft Bushing Kit for Holley carburetors restores your throttle valve assembly to better-than-new tolerances. Using bronze bushings, the kit eliminates common problems such as vacuum leaks, inconsistent idle speeds and binding or sticking throttle. Kit includes 16 bronze bushings, 1 reamer and instructions.
Add up to 25 horsepower instantly with simple, plug-in installation! Only JET Performance Modules provide exclusive, full range Dynamic Spectrum Tuning of the air/fuel ratio, ignition advance, transmission and various other parameters. Each program is track and dyno tested to ensure the most possible horsepower and drivability from each application. 50 state smog legal! More Details Installation Instructions
*See Domestic Information section for horsepower gains and dyno charts.*Stage 2 part numbers end with "S".
Some Products Not For Sale Or Use On Pollution Controlled Motor Vehicles In California
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