SIERRA 18-1258 Modular Gasket Set for Chevy 454 / 502 Gen V Marine V8

The SIERRA 18-1258 Modular Gasket Set is engineered for reliable sealing and performance in Chevy 454 (7.4L) and 502 (8.2L) Gen V marine V8 engines. Ideal for engine rebuilds or seal replacements, this kit is a trusted choice for marine mechanics, boat owners, and Chevy big-block restorers.

Each set includes essential gaskets and seals for a thorough installation, ensuring compatibility with both square port and standard Gen V configurations. Designed for marine applications, it helps maintain engine integrity and reduce the risk of leaks during operation.

• Fits Chevy 454/7.4L Gen V and 502/8.2L Gen V marine V8 engines, including square port heads
• Includes head gasket (18-3887), intake manifold gasket set, and carburetor mounting gaskets (18-0467, 18-0463, 18-0462)
• Comes with 16 valve stem seals and distributor gasket (18-0874)
• Excludes exhaust manifold seals
• Designed for marine engine rebuilds, gasket replacements, and regular maintenance
• Reliable SIERRA quality for long-lasting performance in demanding marine environments

Upgrade your Chevy big-block marine engine with a complete, purpose-built gasket kit. Order the SIERRA 18-1258 Modular Gasket Set today for dependable sealing and peace of mind on the water.