fits model: Street, Avenger.

( Brand: Holley ), ( Manufacturer Part Number: FR-81570 ), ( Part Type: Carburetor ), ( UPC: 090127649947 )
The Holleyspray STREET AVENGER Four-Barrel Carburetor, model number FR-81570, is a high-performance engineering marvel designed to provide optimal fuel delivery for hot rods, muscle cars, and other performance vehicles. This quadra-jet carburetor earns its reputation as a high-performance component through advanced features engineered to boost horsepower, improve driveability, and enhance emissions control.
This Holley Carburetor flaunts a modern, low-profile design. The installed height measures just 5 inches, making it an ideal choice for builds with limited space above the engine. Although compact, the FR-81570 retains the coveted four-barrel appearance, with a polished finish that exudes style and sophistication.
Underneath its elegant exterior lies a fast-idle system engineered for responsive acceleration and efficient fuel consumption in various driving conditions. Holley's patented Dominator Emulsion Control System ensures reliable fuel delivery at all RPMs. The unique feature optimizes fuel pressure during cruising, delivering the ideal air/fuel mixture for your engine.
The Street Avenger carburetor is also EFI flexible, accommodating an optional electronic choke and digital fuel pressure regulator to dramatically improve cold-start ease. Other notable features include an easily adjustable secondary emulsion for fine-tuning airt/fuel ratios and the noise-reducing pulsation damper, which operates silently during high-RPM operation to provide a more refined driving experience.
The HolleyFR-81570 carburetor exceeds expectations when it comes to customizability. The Stainless Steel Air Horns enable easy adapter swapping for varying applications, while the adjustable floor plates cater to individual engine specifications. The Full-Polyurethane Gaskets ensure durable, leak-free assembly and are simple to install.
In conclusion, theHolleySTREET AVENGER Four-Barrel Carburetor, model FR-81570, is an exceptional performance component for fanatics seeking power, style, and versatility. Its compact design, innovative features, and compatibility with EFI accessories make it a popular choice among hot rodders and muscle car enthusiasts. The FR-81570 strikes the perfect balance between power and efficiency, improving acceleration, delivering smooth operation, and suiting a vast array of applications.
The Holley FR-81570 Street Avenger carburetor is a popular choice among automotive enthusiasts for providing excellent fuel delivery and improve engine performance in various applications. Below are the pros and cons of purchasing this carburetor to help you make an informed decision:
Pros:1. High-performance design: The Holley Street Avenger carburetor is engineered to deliver precise fuel mixtures for maximum engine performance. It comes with an advanced metering system and size-selectable jets, allowing users to fine-tune the fuel-air mixture for different driving conditions.
2. Versatile: This carburetor is suitable for a wide range of applications, from street rods and muscle cars to late-model performance vehicles. It can be used in both fuel-injected and carbureted vehicles with minimal modifications.
3. Easy installation: The Holley Street Avenger carburetor comes with a comprehensive installation guide, making it relatively easy to install on most vehicles. It is also equipped with an electric choke and a float bowl venting system, which simplifies the installation process and eliminates the need for additional components.
4. Customizability: The carburetor offers users the flexibility to customize their fuel system according to their driving preferences and engine configuration. With various sizes of jets, emulsion tubes, and other performance parts available, users can fine-tune the carburetor to optimize engine performance.
5. Durable construction: The Holley Street Avenger carburetor features a cast aluminum body and top, ensuring it can withstand the rigors of high-performance driving. The main jets are made of stainless steel, which is resistant to corrosion and wear.
Cons:1. Complexity: Compared to stock carburetors, the Holley Street Avenger carburetor offers a higher level of complexity. Enthusiasts may need to spend considerable time learning the nuances of tuning the carburetor to achieve optimal engine performance.
2. Cost: The Holley Street Avenger carburetor is more expensive than many stock carburetors. Its high performance and versatility justify the cost for many users, but it may not be an affordable option for those on a budget.
3. Mounting requirements: The installation of the Holley Street Avenger carburetor may require additional mounting hardware and modifications to the engine bay. Users may need to purchase and fabricate custom brackets or modify existing components to accommodate the carburetor's unique shape and size.
Conclusion:The Holley FR-81570 Street Avenger carburetor offers significant benefits in terms of performance, versatility, and customizability. However, its complexity, cost, and installation requirements should be considered before making a purchase. If you're an automotive enthusiast looking to substantially enhance your vehicle's engine performance, the Holley Street Avenger carburetor may be an excellent investment. It's worth noting that the learning curve for installing and tuning the carburetor could be steep, but the potential rewards make it an attractive option for many performance-oriented projects.
100% wet-flow tested by Holley technicians to assure it arrives ready run. Compatible with GM, Chrysler, and Ford A/T kick down linkage. Manual choke Cable driven, hand operated for precise cold start control. Buyer pays return shipping.
Quick Change vacuum housing cap allows you to tune for performance or fuel economy springs included. A signature is required on all UPS orders over $750. Optimized Street calibration that works-out-of-the-box.