fits model: Xp, 500.

( Brand: Holley ), ( Manufacturer Part Number: L-4412-10X ), ( Type: Carburetor ), ( Material: Aluminum )
The Holley L-4412-10X Ultra XP 500 CFM 2-Barrel Carburetor (Part No: 0-4412BKX) is a high-performance automatic choke carburetor designed for racers and hot rodders seeking optimal power and consistency for their high-performance applications. Driven by Holley's unwavering commitment to delivering unmatched fuel management solutions, this carburetor boasts several noteworthy features to deliver exceptional results.
This Holley Ultra XP model uses an oversized 500 CFM capacity, ensuring adequate fuel supply for high-performance engines that demand a significant amount of fuel for sustained power. Engineered for ultimate versatility, the carburetor is compatible with various fuel types, such as gasoline, methanol, and ethanol, making it a reliable choice for racers with diverse fuel preferences.
One of its most notable features is the integrated Ultra-Lite Thrust Standard Intake Manifold, which provides high radial and axial metering capabilities to allow for the perfect blend of air and fuel mixture. The carburetor's XV-2200 Dominator 2-Stream Stacked Electro-Vac secondary venturies enhance vacuum sensitivity while improving engine idle quality and drivability. They cater to engines with large exhaust ports and high exhaust volume, optimizing the air-fuel ratio for maximum power, especially crucial in high-performance applications.
The 10-degree rear taper bore design supports efficient fuel atomization for smoother Idle Mixing, reducing the potential for detonation and improving overall combustion stability. Holley's proven design uses a heat shield between the primary and secondary bores to minimize energy loss, ensuring a more stable base idle and a more predictable transition between primary and secondary circuits.
Holley's 0-4412BKX comes standard with a blue bowl gasket and a machined billet bowls that offers a larger fuel capacity and helps improve fuel stability, especially during wide engine speed ranges. Adjustable primary and secondary jet sizes, as well as secondary needle and emulsion tube lengths, ensure the carburetor can be customized to cater to individual engine requirements. The primary jets range from 0.025" - 0.047", while secondary needle sizes span from #1-#28.
The Ultra XP 500 CFM carburetor also includes full-length drain and fuel bowl pickup scoops, which facilitate easy fuel drainage and simplify oiling purposes during maintenance. The carburetor employs stainless steel hardware, ensuring resistance to corrosion and adding a distinct visual touch to the engine bay.
Furthermore, the 0-4412BKX model features a large primary air bleed and an adjustable internal fuel pressure regulator, enabling you to fine-tune the fuel pressure and address fuel system issues with ease. A brass overflow and vacuum port can be found on the top, providing direct access to the float bowls and vacuum manifold vacuum ports for flexible tune-ability options.
The Holley L-4412-10X Ultra XP 500 CFM 2-Barrel Carburetor's simplified mechanism aids in addressing common tuning challenges and offers superior throttle response, making it an indispensable tool for race enthusiasts aiming to gain the competitive edge on the track.
1. High CFM Rating: This Holley carburetor offers a high 500 CFM flow rate, making it suitable for high-performance applications.
2. Durable Construction: Made from heavy-duty materials, this carburetor can withstand the rigors of racing use or high-horsepower engines.
3. Customizable: Adjustable features, such as the injector size and jetting, allow you to fine-tune the mixture to suit your engine and driving conditions.
4. Versatile: Compatible with various engine types and configurations, this carburetor caters to a wide range of applications, including racing and restorations.
5. Aesthetic Appeal: With a classic appearance, the Holley carburetor adds visual appeal to any hot rod or custom vehicle.
Cons:1. Complex Installation: Given the customization options, installing this carburetor can be a more involved process compared to a stock or simpler aftermarket solution.
2. Higher Cost: The Holley L-4412-10X is on the pricier side due to its advanced design, high CFM rating, and racing pedigree.
3. Increased Maintenance: The advanced nature of this carburetor implies that it may require more frequent adjustments and maintenance to perform optimally.
Conclusion:The Holley L-4412-10X Ultra HP 2-Barrel 500 CFM Carburetor (0-4412BKX Race) offers significant benefits for high-performance applications. With a high CFM flow rate, durable construction, and customizable features, it's a popular choice among racers and hot rod enthusiasts. However, the installation process is more complex, and the higher cost and increased maintenance requirements may deter those not fully committed to the high-performance lifestyle.
Recommendation:If you're looking for a high-performance, reliable, and customizable solution for your racing or high-horsepower project, the Holley L-4412-10X Ultra HP 2-Barrel 500 CFM Carburetor (0-4412BKX Race) is an excellent choice. However, be prepared for the increased cost and more involved installation process. For less demanding applications, consider a less complex, stock or entry-level aftermarket carburetor that may better meet your requirements and budget.
A if you follow the golden rule, and treat me as would like to be treated, I will do my best make it right by. HOLLEY ALUMINUM ULTRA XP 2-BARREL 500 cfm CARBURETOR 0-4412BKX RACE. I sometimes make mistakes, but i'm not out to cheat anyone, or sell you something you're 100% happy with. Comes with an extra metering plate.
Super nice carb, moves freely and wan't use for very long. Comes as pics let me know if there is an issue.