Holley 770 Ultra Street Avenger with Black Billet

ULTRA light: Crafted from aluminum for an impressive 43% weight reduction.

ULTRA strong: Features billet metering blocks and base plates for enhanced durability.

ULTRA cool: Showcases black anodized billet aluminum metering blocks and base plate that look as good as they perform.

ULTRA easy: Comes with a built-in sight window for effortless float adjustments.

ULTRA fast: Optimized for high-performance fuel curves.

The Ultra Street Avenger carburetors are designed with a full aluminum construction and equipped with 6061-T6 billet aluminum metering blocks and base plates. They weigh about 5 pounds less than traditional zinc carburetors, making them a fantastic choice for performance enthusiasts.

These new Ultra Street Avenger carburetors maintain all the fantastic features of their aluminum predecessors. You’ll love the tumble-polished aluminum finish, quick-change vacuum secondaries for easy tuning, and four vacuum ports that accommodate all necessary vacuum accessories. Plus, the factory preset electric choke ensures smooth startups every time. With built-in fuel filters and an included fuel line kit, you won't have to make unnecessary trips to the parts store. The Ultra Street Avengers are calibrated for the street, just like the zinc versions, ensuring they run beautifully on your vehicle. The anodized metering blocks and base plate not only look sleek but also come with a clear fuel level sight glass for easy, mess-free adjustments.

When it comes to performance, trust only the best. Holley has been a leader in the modular carburetor industry for over a century and has powered every NASCAR champion since the 1960s.

Important Downloads:

• Instructions for Part# 0-86770BK
• Avenger Limited Lifetime Warranty
• Carburetor Numerical Listing for Part #0-86770BK

Features:

• Stylish black anodized billet aluminum metering blocks and base plate for a perfect seal.
• Optimized street calibration that works right out of the box.
• Factory preset electric choke for effortless startups.
• Vacuum secondaries that adapt to a wide variety of vehicles, with a quick-change vacuum housing cap for tuning performance or fuel economy (springs included).
• Four corner idle system for precise idle control.
• Clear fuel level sight glass for easy adjustments without the mess.
• Lightweight aluminum construction for a 43% weight savings.
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage (additional parts may be required).
• Fuel line kit included to save you extra trips to the parts store.
• Limited lifetime warranty – guaranteed to be free from defects in material and workmanship for the product's lifetime!
• 100% wet-flow tested by Holley technicians to ensure it’s ready to run right out of the box!

Specifications:

• Barrels: 4
• Billet Color: Black
• Booster: Down Leg
• CFM: 770
• Choke: Electric
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 72
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 31
• Product Type: 4150 Model Carburetor
• Secondaries: Vacuum
• Secondary Main Jet: 84
• Supercharged Application: No
• Throttle Bore: 1.6875 inch
• Vacuum Ports: 1 timed (spark) port, 2 full, and 1 PCV port
• Warranty: Limited 1 Year Warranty

Notes:

• This carburetor features a square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with a 5 3/16" x 5 5/8" bolt pattern. If you have a spreadbore style intake manifold, an adapter will be necessary for installation, similar to the Mr. Gasket #1932.