Carburetor Renew Kit Ultra HP

The Carburetor Renew Kit Ultra HP (Holley HLY37-1548) is a complete fast-kit rebuild solution designed for high-performance Holley Ultra HP carburetors running gasoline fuel systems. This kit exists because carburetor performance degrades over time—fuel varnish deposits, worn seals, and deteriorated gasket material rob efficiency and throttle response. Whether you're restoring a classic muscle car, maintaining a street rod, or refreshing a performance engine build, this renewal kit restores your carburetor to factory specifications without requiring a complete replacement.

This fast-kit format includes all internal renewal components—gaskets, seals, and wear items—engineered to the OEM tolerances that Holley's Ultra HP platform demands. The kit addresses the most common points of degradation: fuel bowl gaskets that weep, power valve seals that allow fuel bypass, and internal passages that accumulate deposits affecting metering and idle quality. Installation requires standard carburetor tools and mechanical competency; the modular design allows targeted replacement of problem areas without complete disassembly, saving time on the bench while ensuring proper sealing and function restoration across all fuel circuits.

Performance enthusiasts and experienced mechanics benefit most from this kit because it preserves the tuning and jetting work already dialed into an existing Holley Ultra HP carburetor. Rather than starting over with a different unit, rebuilding with the Carburetor Renew Kit Ultra HP maintains your baseline performance while eliminating fuel leaks, hesitation, and idle instability caused by worn internals. This approach proves ideal for street applications, bracket racing, and vintage truck restorations where carburetor familiarity and repeatability matter. Compact at 0.56 lbs and designed for easy workbench access, the kit suits both professional shop environments and dedicated home garages.