350-500CFM Holley Pro Series Renew Kit

The 350-500 CFM Holley Pro Series Renew Kit by Advanced Engine Design is a complete carburetor rebuild solution engineered for Holley 2300 series carburetors operating in the 350 to 500 CFM flow range. This kit restores fuel delivery precision and throttle response on gasoline engines, making it essential for rebuilding or refreshing worn carburetors that have accumulated varnish, fuel degradation, or worn internal components.

Designed specifically for the Holley 2300 platform, this renewal kit includes all necessary gaskets, seals, and internal components required to restore carburetor functionality to like-new condition. The 350–500 CFM specification aligns the kit with mid-range naturally aspirated engines common in street vehicles and entry-level performance builds where balanced fuel atomization and consistent idle and cruise characteristics are critical. By replacing degraded rubber seals and worn internal passages, the kit eliminates lean-condition stumbling, hesitation, and fuel weeping that typically signal carburetor deterioration.

This rebuild kit is ideal for restoration work, performance tuning, and routine carburetor maintenance on classic and modern carbureted engines. Whether addressing seasonal storage varnish buildup, worn float needles, or degraded gasket seals, this Advanced Engine Design kit offers a cost-effective alternative to carburetor replacement while preserving original equipment specifications and bolt-on compatibility.

The Holley 2300 platform remains a popular choice in street performance and restoration communities due to its reliability and tuning flexibility. Keeping rebuild kits in stock ensures that carburetor service can be completed without extended downtime, making this Pro Series renewal kit a practical addition to any engine builder's or hobbyist mechanic's inventory.