Introducing the Holley 4150 670CFM H/C Street Avenger Carburetor, a fantastic option for those looking to boost their engine's performance right from the start! These carburetors are designed to fit seamlessly onto your vehicle with no hassle. You’ll love the quick-change vacuum secondary feature, which makes fine-tuning a breeze. Plus, with optimized street calibrations, you can enjoy a smooth drive every time.

Need to connect various vacuum accessories? No problem! The Street Avenger comes equipped with four vacuum ports to cover all your needs. Starting your engine is a cinch thanks to the factory preset electric choke, and you won't have to worry about fuel debris with the built-in fuel filters. We've even included a fuel line kit, saving you those extra trips to the parts store.

What’s even better? The Avenger series boasts the first-ever limited lifetime warranty on carburetors. With a warranty like that and a comprehensive instruction manual included, you can rest easy knowing you’re set for years of reliable performance.

• Instructions for Part# 0-81670
• Avenger Limited Lifetime Warranty
• Carburetor Numerical Listing for Part #0-81670

• Vibratory polished for a stunning appearance
• Optimized street calibration ready to go right out of the box
• Manual choke (cable driven, hand operated) for precise control during cold starts
• Vacuum secondaries provide versatility for various vehicles. The quick change vacuum housing cap lets you tune for performance or fuel economy (springs included)
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage (additional parts may be needed)
• Fuel line kit included to eliminate unnecessary trips to the store
• Limited lifetime warranty - Guaranteed free from defects in material and workmanship for the life of the product!
• 100% wet-flow tested by Holley technicians to ensure it’s ready to run upon arrival!

• Barrels: 4
• Booster: Straight
• CFM: 670
• Choke: Manual
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 65
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 31
• Product Type: 4150 Model Carburetor
• Secondaries: Vacuum
• Secondary Main Jet: 68
• Supercharged Application: No
• Throttle Bore: 1.563 inch
• Vacuum Ports: 1 timed (spark) port, 2 full, and 1 PCV port
• Warranty: Limited 1 Year Warranty

• 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 uses a spreadbore style, you will need an adapter for installation, similar to the Mr. Gasket #1932.