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Holley 4150 Ultra HP Series Carburetors
Trust Holley Hardcore Carburetors for Serious Performance
Based on the 4150 HP carb and available in 650 & 750 cfm, the Ultra line has billet metering blocks and baseplate. Changeable emulsion jets, idle feed restrictors & power valve restrictors enable infinite tuning of nearly any engine.
Calibrated for gasoline
High-strength sealing surfaces
Built-in oversized glass sight windows
Center-hung dual inlet floats
Notched floats and jet extensions for continuous fuel delivery
Power valve blowout protection
Four corner idle system
Buttonhead throttle plate screws for less air restriction
Stainless steel throttle plates for corrosion protection
Contoured Venturi inlet provides more balanced airflow, which increases power
Spun-in boosters won't fall into engine
Progressive mechanical secondaries
Primary and secondary accelerator pumps are both 30cc
100% wet-flow tested and calibrated
Screw-in air bleeds
Billet metering blocks and billet baseplate
Changeable emulsion jets, idle feed restrictors, and power valve restrictors