Valve Cover Spacer Seal - GM LS Series

The Valve Cover Spacer Seal – GM LS Series is a precision rubber gasket assembly engineered to maintain a proper seal between the valve cover and cylinder head on General Motors LS-series engines. This kit addresses a common problem in LS engine builds: uneven valve cover fitment and oil seepage that occurs when aftermarket components or custom headers alter the stock mounting geometry. Whether you're rebuilding a classic car with an LS swap, tuning a performance engine, or restoring an original GM vehicle, this spacer seal eliminates leaks that plague improper valve cover installation.

Constructed from durable rubber compound, the Valve Cover Spacer Seal creates a compressible layer that compensates for minor variations in mounting surface flatness and component heights inherent to LS engine platforms. The kit design allows the valve cover to seat correctly even when header clearance or intake manifold modifications reduce available space, while the rubber material absorbs vibration and thermal cycling that can crack harder gasket materials. This spacer-and-seal approach maintains oil containment under boost, high RPM operation, and extreme temperature swings common in both street and race applications.

LS engine builders, hot rod shops, and performance enthusiasts rely on this kit when stock valve covers won't seal properly after engine modifications. Installation is straightforward: the spacer sits between the valve cover mounting flange and cylinder head, with the rubber seal compressing to create a watertight barrier. Compatible with all LS variants—LS1, LS2, LS3, LSA, and truck versions—this kit is essential for any build where aftermarket accessories or custom fabrication has altered OEM valve cover geometry. At 0.5 lbs and compact dimensions, it fits easily in any engine bay and requires no special tools or modifications.