Holley 670 Ultra Street Avenger with Blue Billet

ULTRA light: Crafted from aluminum, this beauty offers an impressive 43% weight savings.

ULTRA strong: Featuring durable billet metering blocks and base plates that stand the test of time.

ULTRA cool: The vibrant blue anodized finish on the billet aluminum metering blocks and base plate adds a stylish touch.

ULTRA easy: With a built-in sight window, making float adjustments is as simple as can be.

ULTRA fast: Designed with high-performance fuel curves to keep your engine running smoothly.

The Ultra Street Avenger carburetors are made entirely of aluminum, boasting metering blocks and a base plate constructed from 6061-T6 billet aluminum. This means they weigh about 5 lbs less than similar zinc carburetors, making them a fantastic choice for performance enthusiasts.

These new Ultra Street Avenger carburetors maintain all the great features of their aluminum counterparts, including a tumble-polished aluminum finish, quick-change vacuum secondaries for easy tuning—helping you optimize either performance or fuel economy. They come equipped with four vacuum ports for all your necessary accessories, a factory preset electric choke for effortless startups, built-in fuel filters, and a complete fuel line kit to save you those extra trips to the parts store. With optimized street calibration, you can trust that these carburetors will run beautifully on your vehicle. Plus, the anodized metering blocks and base plate are made from 6061-T6 billet aluminum, complete 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# 0-86670BL
• Avenger Limited Lifetime Warranty
• Carburetor Numerical Listing for Part #0-86670BL

Features:

• Striking blue anodized billet aluminum metering blocks and base plate for both aesthetics and a secure gasket seal.
• Optimized street calibration that works right out of the box.
• Factory preset electric choke for seamless startups.
• Vacuum secondaries for versatility across a range of vehicles. The quick-change vacuum housing cap allows tuning for either performance or fuel economy (springs included).
• Four-corner idle for precise control over your idle system.
• Clear fuel level sight glass for easy, mess-free fuel level adjustments.
• Lightweight aluminum construction for a significant 43% weight savings.
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage (additional parts may be needed).
• Includes a fuel line kit to keep you from making unnecessary trips to the parts store.
• Limited lifetime warranty—guaranteed to be free from defects in materials and workmanship for the life of the product!
• 100% wet-flow tested by Holley technicians to ensure it’s ready to run right out of the box!

Specifications:

• Barrels: 4
• Billet Color: Blue
• Booster: Straight
• CFM: 670
• Choke: Electric
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 63
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 31
• Product Type: 4150 Model Carburetor
• Secondaries: Vacuum
• Secondary Main Jet: 73
• 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, making it a suitable replacement for Holley, Edelbrock, Carter AFB, and Autolite style carburetors with a 5 3/16" x 5 5/8" bolt pattern. If your vehicle has a spreadbore style intake manifold, you will need an adapter for installation, similar to the Mr. Gasket #1932.