Valve Seal Kit Gen V LT1 .552in ID - .342in Stem

The Valve Seal Kit Gen V LT1 .552in ID - .342in Stem by Brian Tooley Racing is an essential internal engine component designed for Gen V small-block LS platforms, particularly the LT1 engine found in modern Chevrolet performance vehicles. Whether you're rebuilding a high-mileage engine, addressing valve cover oil seepage, or performing a full top-end refresh, this precision seal kit prevents oil from entering the combustion chamber and maintains proper cylinder pressure. As an experienced mechanic, you know that worn valve seals are a common culprit in blue smoke on startup and inconsistent idle quality—this kit addresses that problem directly at the source.

This valve seal kit features the correct inner diameter (.552 inches) and stem diameter (.342 inches) specifications critical for a proper seal on Gen V LT1 cylinder heads. Brian Tooley Racing manufactures these seals to OEM-plus tolerances, ensuring a consistent fit that doesn't require reaming or custom fitting during installation. The seals are constructed from reinforced elastomer compounds engineered to withstand elevated temperatures and aggressive valve timing common in performance applications. Whether you're running stock or modified cam profiles, these seals maintain their integrity across the RPM range without slipping or hardening prematurely.

This kit is ideal for anyone performing valve spring replacement, rocker arm work, or any procedure requiring valve seal removal on LT1-powered vehicles. Installation requires standard valve spring compressor tools and basic cylinder head work experience—no special fixtures needed. The lightweight, compact package (0.15 lbs) fits easily in your toolbox, and the complete kit eliminates the hassle of sourcing seals individually. For street machines, race engines, and everything in between, Brian Tooley Racing's valve seal kit delivers reliability and peace of mind on every cold start.