Ultra HP Fuel Bowl Kit Polished

The Ultra HP Fuel Bowl Kit Polished (HLY134-78S) is a precision secondary fuel bowl assembly engineered for high-performance carburetors requiring reliable, efficient fuel delivery under demanding conditions. Designed specifically for experienced tuners and hot rod builders, this Holley component addresses the critical need for consistent fuel supply to the secondary stage of dual-stage carburetor systems. Whether you're building a street machine, strip racer, or restoring a classic with modern performance upgrades, a quality fuel bowl assembly directly impacts throttle response, fuel atomization, and overall engine stability across the RPM range.

Manufactured from aluminum and finished in tumble-polished form, the Ultra HP Fuel Bowl Kit combines weight savings with corrosion resistance and visual appeal under the hood. The center-hung design positions fuel delivery at the bowl's centerline, optimizing fuel flow geometry and reducing sloshing during hard acceleration and cornering—critical for maintaining proper fuel level at the metering jets during dynamic driving. An integrated sight window provides real-time visual verification of fuel level, allowing you to diagnose lean-condition issues and tune fuel delivery accurately without guesswork. This kit is compatible with Holley 4150, 4160, and 4500-series carburetors and includes all gaskets and hardware needed for installation, eliminating sourcing delays.

Professional mechanics and dedicated enthusiasts benefit most from this fuel bowl when upgrading tired original equipment or replacing damaged secondary bowls in established Holley carburetor platforms. The polished finish makes it an ideal choice for show vehicles where appearance matters as much as function, while the precision engineering ensures it performs equally well on race-focused builds. Installation is straightforward for anyone experienced with carburetor work; simply unbolt the original secondary bowl, transfer gaskets if reusable, and install the new assembly with supplied hardware. Verify proper fuel level using the sight window after initial startup to ensure optimal jetting performance.