Gasket Kit O-Ring Cord Hi-Ram Intake Plenum

The Gasket Kit O-Ring Cord Hi-Ram Intake Plenum from Holley is a crucial sealing component designed for high-performance intake manifold assemblies, particularly in modified and racing engines. This kit is ideal for automotive enthusiasts and professional builders who are working on street or competition engines utilizing a Holley hi-ram intake system.

This gasket kit ensures a perfect seal between the plenum and cylinder head ports, effectively preventing vacuum leaks that can diminish horsepower and disrupt fuel mixture. The precision-cut elastomer seals conform to port surfaces while maintaining consistent clamp load across the plenum flange, accommodating micro-finish variations found on cast aluminum plenums and ported cylinder heads.

Whether you're rebuilding after a valve job, swapping to a ported head, or performing seasonal engine maintenance, this OEM-specification kit guarantees correct fitment and performance. Its material composition resists exposure to fuel, coolant, and oil while maintaining sealing integrity across thermal cycling, making it an excellent choice for both small-block and big-block applications.