Holley Prem Street Carbs (Avengers)

Ultra light - Aluminum construction for 43% weight savings.Ultra strong -Billet metering blocks & base plate.Ultra cool - Black anodized billet aluminum metering blocks and base plate.Ultra easy - Built in sight window for simple float adjustment.Ultra fast - High-performance fuel curve.

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.

Specifications

Barrels: 4

Billet Color: Black

Booster: Straight

CFM: 570

Choke: Electric

Emission Code: 3

Finish: Hard Core Gray

Fuel: Gasoline

Fuel Inlet: Dual

Material: Aluminum

Model: 4150

Primary Main Jet: 64

Primary Power Valve: 6.5

Primary Pump Nozzle Size: 31

Product Type: 4150 Model Carburetor

Secondaries: Vacuum

Secondary Main Jet: 72

Supercharged Application: No

Throttle Bore: 1.562 inch

Vacuum Ports: 1 timed (spark) port, 2 full, and 1 PCV port

Features:

• Hard Core Gray™ w/ black anodized billet aluminum metering blocks/base plate. Casting is hard coat anodized for ultimate corrosion resistance
• 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% 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
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run.