Ultra HP 4412 Carb 2BBL 500 CFM

The Holley Ultra HP 4412 Carb 2BBL 500 CFM is a precision fuel delivery system engineered for high-performance engine builds requiring reliable, consistent carburetion. This two-barrel carburetor serves classic muscle cars, street rods, and specialized powerplants where traditional EFI installation proves impractical or undesired. The 500 CFM rating positions this unit as an ideal solution for mid-range displacement engines and street applications demanding responsive throttle control without excessive fuel consumption.

Built from aluminum with black anodized and gray paint finish, the Holley Ultra HP 4412 delivers durability against corrosion and thermal stress inherent in engine bay environments. The two-barrel design optimizes fuel atomization across the RPM band, while the no-choke configuration eliminates cold-start complexity and reduces component failure points. A single inlet Holley flange mount simplifies installation on compatible manifolds, and the compact footprint—measuring 11.1 x 7.9 x 12.2 inches and weighing just 6.1 pounds—allows flexible engine bay packaging without sacrificing flow efficiency or response characteristics.

Experienced builders and enthusiasts select the Ultra HP 4412 when upgrading carbureted platforms or restoring original equipment specifications on vintage muscle and classic vehicles. Installation requires verification of manifold compatibility with Holley flange patterns and confirmation that the 500 CFM rating aligns with engine displacement, cam profile, and intended power band. Tuning expertise or dyno validation ensures optimal jetting for your specific fuel type and ambient conditions, delivering smooth idle quality, strong mid-range response, and reliable full-throttle performance across varied driving scenarios.