The 5.7 Vortec family powers many GM marine and automotive applications. This guide highlights high-quality cylinder heads and related components to help you assess options for performance, reliability, and compatibility. Each option includes key features to compare, from stainless valves to OEM-style specs and ready-to-install assemblies.
| Product | Brand | Notes |
|---|---|---|
| 5.7L GM Vortec Marine Engine Cylinder Head | Marine Engines 4 Less | Replaces Mercruiser & Volvo Penta; 1997-newer |
| New Replacement Vortec Cylinder Heads GM Marine 5.7L 350 | JJ Original Equipment | Paired heads with stainless valves; U.S. assembled |
| NEW 5.7 OHV V8 Cylinder Head Pair | ADV Cylinder Heads | Casting #906 & 062; thicker decks for strength |
| Mizumo Auto Full Gasket Set Head Bolts | Mizumo Auto | MLS and multi-material gaskets; head bolts included |
| 5.7L, 350 CID Marine Cylinder Head Gasket Kit | Marine Engines 4 Less | Replaces Mercruiser 27-75611A03; marine-oriented kit |
5.7L GM Vortec Marine Engine Cylinder Head
This is a new aftermarket complete cylinder head designed for 5.7L GM marine engines. It includes valves and springs and is intended to replace Mercruiser and Volvo Penta applications from 1997 onward. It fits a range of marine configurations and extends compatibility for GM Marine 5.7L models. The assembly aims to deliver reliable valve train operation with standard port geometry to maintain efficient flow characteristics.
CPWK166 Head Gasket Set Bolt Kit
This kit includes a head gasket set and a bolt kit for 96-02 Cadillac Escalade 5.7L V8 OHV engines with the Vortec design. It emphasizes correct fitment for the intended platform and comes with customer service support for compatibility guidance. This option is suitable for those performing head gasket changes alongside a broader engine service.
New Replacement Vortec Cylinder Heads GM Marine 5.7L 350
These are new aftermarket stock 5.7L/350 Vortec cylinder head assemblies with part numbers aligning to 10239906 and related variations. The heads are assembled in the U.S. and are designed to fit marine environments where a direct swap is desired. They feature stainless or equivalent valve components intended to support reliable combustion and engine efficiency in marine V8 configurations.
Mizumo Auto Full Gasket Set Head Bolts
The Mizumo Auto gasket set includes a full gasket kit and head bolts designed for 96-00 Cadillac, GMC, and Chevrolet 5.7L OHV Vortec engines. The set uses multi-layer steel and compatible graphite materials to enhance sealing under high-heat conditions. The included head bolts provide reinforcement for the torque sequence and ensure a solid clamping force across the cylinder head. This option supports complete engine sealing during rebuilds.
5.7L, 350 CID Marine Cylinder Head Gasket Kit
This complete marine head gasket kit targets 5.7L Vortec engines from Mercruiser, Volvo Penta, Crusader, and Marine Power. It is designed to replace full gasket sets during rebuilds and to restore proper sealing across the cylinder head interface. The kit emphasizes compatibility with marine-specific head gasket profiles and includes gaskets tailored for the 5.7L Vortec family.
Buying Guide
- Vehicle/engine compatibility: Confirm the exact model year, ECM, and marine/automotive designation (GM 5.7L Vortec, 906/062, etc.) to avoid wrong-head purchases.
- Material and durability: Consider heads with hardened valve seats, stainless valves, or OEM-grade materials for longevity in high-pressure, heat-prone environments.
- Deck thickness and strength: Thicker decks and reinforced blocks reduce warping risk under torque; essential for rebuilds and higher-performance builds.
- Packaging and completeness: Decide between complete assemblies (heads with valves and springs) versus bare heads, depending on whether you’re reusing existing hardware.
- Marine versus automotive orientation: Marine engines encounter more salt exposure and vibration; select components rated for marine use if applicable.
- Warranty and support: Favor brands offering technical support and clear return policies, particularly for rebuilt or aftermarket parts.
- Installation considerations: Verify head gasket compatibility, torque specs, and required torque sequences; some kits include bolts to simplify the process.
- Cost versus risk: While aftermarket heads may save money, OEM- or marine-certified variants often provide better reliability in long runs.