Holley 850 CFM Aluminum Street HP Mechanical Secondary Carburetor

Get ready for some serious tire-smoking performance without breaking the bank! The all-new Aluminum Street HP carbs are designed to be up to 40% lighter, making them not only easier on your vehicle but also on your wallet.

Holley is excited to introduce the Aluminum Street HP™. This carburetor takes the best features from Holley's race-inspired 4150 HP™ carbs and adapts them for street and light competition use. With its aluminum contoured main body design, derived from the race-winning 4150 HP™, this carb boasts a polished shiny finish and screw-in air bleeds for precise tuning.

The metering system is equipped with a timed spark port for a vacuum advance distributor and is calibrated to work seamlessly with hot street or strip engines, ensuring fantastic throttle response and drivability. The Street HP base plate includes plenty of vacuum ports for power brakes, PCV, and more.

The Aluminum Street HP combines the fantastic features of the race-bred HP and the Double Pumper, making it the ultimate carburetor for both street and strip applications.

Important Downloads:

• Instructions for Part # 0-82851SA
• Carburetor Numerical Listing for Part #0-82851SA

Features:

• Lightweight aluminum construction for durability and sleek looks
• Optimized for street and strip use, delivering excellent throttle response and drivability
• Contoured venturi inlet for balanced airflow, boosting horsepower
• Screw-in air bleeds for accurate tuning
• Four corner idle system for precise idle control
• Mechanical secondaries for impressive performance
• Dual accelerator pumps for extra fuel during initial acceleration
• Dual feed fuel inlets ensure high-volume fuel delivery
• Available in 650, 750, 850, and 950 CFM options
• Designed for lightweight vehicles with manual transmissions or automatics featuring high stall and low gearing
• 100% wet-flow tested by Holley technicians to ensure it's ready to run right out of the box!
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage (additional parts may be required).

Specifications:

• Barrels: 4
• Booster: Down Leg
• CFM: 850
• Choke: None
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 80
• Primary Power Valve: 4.5
• Primary Pump Nozzle Size: 28
• Product Type: 4150 Model Carburetor
• Secondaries: Mechanical
• Secondary Main Jet: 80
• Secondary Pump Nozzle Size: 28
• Supercharged Application: No
• Throttle Bore: 1.688 inch
• Venturi Size: 1.563 inch
• Warranty: Limited 90 Day

Notes:

• This carburetor features a square bore flange bolt pattern, making it compatible with Holley, Edelbrock, Carter AFB, and Autolite style carburetors that have a 5 3/16" x 5 5/8" bolt pattern. If your intake manifold is of the spreadbore style, an adapter (similar to Mr. Gasket #1932) will be necessary for installation.