Holley 0-86770BK Ultra Street Avenger Carburetor 770 CFM 4150 Vacuum Secondaries Shiny Gasoline

Ultra light - Aluminum construction for 43 percent weight savings Ultra strong -Billet metering blocks & base plates Ultra cool - Black anodized billet aluminum metering blocks and base plate Ultra easy - Built in sight window for simple float adjustments Ultra fast - High-performance fuel curves The Ultra Street Avenger carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. They weigh in at approximately 5 lbs less than a comparable zinc carburetor.

The new Ultra Street Avenger carburetors have the same great features as their aluminum counterparts such as a tumble polished aluminum finish, quick change vacuum secondaries for easy tuning to optimize performance or fuel economy, four vacuum ports for all necessary vacuum accessories, factory preset electric choke for easy startups, built-in fuel filters, and an included fuel line kit so there are no unnecessary trips back to the parts store. Ultra Street Avengers feature the same optimized street calibration as the zinc versions so you know they will run great on your vehicle.

In addition, the Ultra Street Avenger now comes with anodized metering blocks and a base plate made from 6061-T6 billet aluminum and a built in, clear fuel level sight glass for easy, no mess fuel level adjustments. Don't trust your performance to just anyone, Holley is the only Modular carburetor company that has been in business for over 100 years and has powered every Nascar champion since the 60's.

Features and Benefits:

• Shiny with black anodized billet aluminum metering blocks/base plate for good looks and true gasket sealing Ultra Street Avengers feature an optimized street calibration that works-out-of-the-box Factory preset electric choke for easy startups Vacuum secondaries allow use on a wide variety of vehicles
• Quick Change vacuum housing cap allows you to tune for performance or fuel economy (springs included) 4 corner idle allows you to precisely control your idle system Built in, clear fuel level sight glass for easy, no mess fuel level adjustments Aluminum construction for a 43 percent weight savings Compatible with GM, Chrysler, and Ford A/T kickdown linkage
• Additional parts may be required
• Fuel line kit included so there are no unnecessary trips back to the parts store Limited lifetime warranty - Guaranteed to be free from defects in material and workmanship for the life of the product! 100 percent wet-flow tested by Holley technicians to assure it arrives ready to run!

Associated Comments:

• This model of carburetor has the square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter Afb, and Autolite style carburetors with 5 3/16 inch x 5 5/8 inch bolt pattern.
• If you have a spreadbore style intake manifold, you will need an adapter to install this carburetor. Similar to the Mr.
• Gasket #1932.

Details:

• Barrel Quantity: 4.0
• Billet Color: Black
• Body Color: Polished
• Body Finish: Polished
• Booster: Downleg
• Booster Design: Downleg
• CFM: 770.0
• Carburetor Material: Aluminum
• Carburetor Use: Street
• Choke Type: Electric
• Condition: New
• Cubic Feet Per Minute Rating: 770.0
• Finish: Shiny
• Flange Type: Square/4150
• Fuel Type: Gasoline
• Fuel Inlet: Dual
• Grade Type: Performance
• Linkage Attached: Yes
• Marine Approved: No
• Marine Use: No
• Material: Aluminum
• Model: 4150
• Mounting Hole Quantity: 4.0
• Primary Jet Diameter: 72.0
• Primary Main Jet: 72.0
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 31.0
• Secondaries: Vacuum
• Secondary Main Jet: 84.0
• Spacer Included: No
• Supercharged Application: No
• Throttle Bore: 1.6875 inch
• Vacuum Ports: 1 timed (spark) port, 2 full, and 1 PCV port
• Warranty: Manufacturer's Limited Lifetime Warranty

Installation Guide: Download PDF

Installation / Product Video: Watch on YouTube

⚠️ California Proposition 65 Warning
California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm. Please visit www.p65warnings.ca.gov for more information.