HOLLEY 0-86670RD Ultra Duel Vacuum Secondaries 4150

( Brand: Holley ), ( Manufacturer Part Number: 0-86670RD ), ( Choke Type: Electric ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Manufacturer Warranty: Lifetime ), ( Material: Aluminum ), ( Vintage Part: No ), ( Country/region Of Manufacture: United States ), ( Universal Fitment: Yes )

Review HOLLEY 670 Ultra Duel Feed Vacuum Secondaries 4150 fits STREET AVENGER

The Holley 0-86670-RD 670 Ultra Street Avenger Duel Vacuum Secondaries 4150 is a high-performance carburetor kit designed for automotive applications seeking improved throttle response, increased fuel efficiency, and enhanced power delivery. This kit utilizes Holley's advanced 670 CFM Ultra Street Avenger dual-plane intake and 4150 series secondary venturi system, which delivers optimal air and fuel mixture for combustion.

The 670 Ultra Street Avenger intake features a unique design with a large, oval-shaped design that improves airflow and velocity, resulting in a more efficient fuel delivery system. The intake is CNC-machined from aluminum and includes a built-in fuel pressure regulator and a removable, high-flow fuel filter. The intake also incorporates Holley's patented "Power Port" technology, which optimizes airflow and fuel mixture for maximum power and torque.

The 4150 series secondary venturi system includes a set of dual-plane, dual-feed, and dual-venturi secondary carburetors. These carburetors feature a unique design with a large, tapered venturi that improves fuel atomization and vaporization, resulting in a more complete combustion process. The carburetors also include Holley's advanced vacuum secondary system, which utilizes a dual-feed design to provide optimal fuel delivery under various engine loads and vacuum conditions.

The kit includes all necessary hardware, including mounting brackets, fuel lines, and throttle linkages. The kit is suitable for use with both natural and forced-induction applications and can be easily adapted for use with electronic fuel injection systems. The kit is also compatible with a wide range of ignition systems, including points, distributorless ignition, and electronic ignition systems.

The Holley 0-86670-RD 670 Ultra Street Avenger Duel Vacuum Secondaries 4150 is a high-performance carburetor kit that delivers improved throttle response, increased fuel efficiency, and enhanced power delivery for automotive applications. With its advanced design features, including the 670 CFM Ultra Street Avenger intake and 4150 series secondary venturi system, this kit is ideal for enthusiasts seeking to maximize the performance of their engine.

The Holley 0-86670-RD 670 Ultra Street Avenger Duel Vacuum Secondaries 4150 is a carburetor designed for street performance applications. Like any automotive component, it has its pros and cons. Let's examine each:

1. Dual-plane intake manifold compatibility: This carburetor is suitable for use with dual-plane intake manifolds, which are common in high-performance applications.

2. Dual-vacuum secondaries: The dual-vacuum secondaries provide improved idle quality and vacuum secondary throttle bodies deliver better response at wide-open throttle (WOT).

3. Fuel management: The Holley Ultra Street Avenger carburetor delivers precise fuel management, ensuring optimal engine performance.

4. Adjustability: This carburetor offers a wide range of adjustability, allowing you to fine-tune the fuel and air mixture for your specific engine setup.

5. Easy installation: The carburetor comes with a detailed installation manual and all necessary hardware for a straightforward installation process.

1. Cost: Compared to some other carburetors, the Holley 670 Ultra Street Avenger can be quite expensive.

2. Complexity: Due to its advanced features, this carburetor might be more complicated to set up and tune than some other options.

3. Requires specialized tools: Some adjustments and installations may require specialized tools, which can add to the overall cost.

The Holley 0-86670-RD 670 Ultra Street Avenger Duel Vacuum Secondaries 4150 is an excellent choice for those seeking high-performance carburetor options for their street applications. Its pros, such as dual-vacuum secondaries, fuel management, and adjustability, significantly outweigh the cons, which include cost and complexity. Ultimately, if you're willing to invest in the time and resources required for installation and tuning, this carburetor can deliver impressive results.

If you're looking for a high-performance carburetor for your street application, the Holley 0-86670-RD 670 Ultra Street Avenger Duel Vacuum Secondaries 4150 is a solid choice. Its advanced features and precise fuel management capabilities make it a worthwhile investment for those who are committed to optimizing their engine's performance. To get the most out of this carburetor, be prepared to invest time and resources into the installation and tuning process.

Details:

Otherwise it is brand new in original packaging. Loosing power at 6000 rpm Electric choke. Needed more cfm .

Originally $899 Holley 670 Ultra Street Avenger Duel Feed With Vacuum secondaries and Red Billet Metering Blocks throttle plate.

part #: 086670rd prices

• $229.95-$650.00

specifications carbcoon:

• for models: Street, Avenger
• brand: Holley
• mpn: 0-86670rd
• choke type: Electric
• type: Carburetor
• mounting flange type: Square Bore
• manufacturer warranty: Lifetime
• material: Aluminum
• vintage part: No
• country/region of manufacture: United States
• universal fitment: Yes

payments carbcoon:

• wallet: Paypal
• credit card: Diners-club
• other

seller carbcoon:

• city: Southampton, Pennsylvania
• # reviews: 400
• rating: 100.0%

shipping carbcoon:

• service: USPS Priority Mail
• cost: $74.25
• transit: 5-13 Days
• type: Calculated
• class: Expedited
• carrier: USPS

returns carbcoon:

• policy: No Returns

offer carbcoon:

• options: Ship-to-home
• best offers: True
• sold: 0
• availability: In Stock
• quantity: 1
• started: August 21, 2025

general carbcoon:

• condition: New other see details
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

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