2239250AA Caterpillar 3406E / C15 / C15 ACERT Stage 4 Cylinder Head

The 2239250AA Stage 4 Cylinder Head is a premium heavy-duty  Aftermarket performance upgrade designed for Caterpillar 3406E, C15, and C15 ACERT engines. Engineered for high-horsepower, high-boost, and heavy-haul applications, this upgraded head helps eliminate common OEM issues such as cracking, overheating, and head gasket failures.

Key Features

• Machined fire ring grooves for superior head gasket sealing
• Inconel intake & exhaust valves for extreme heat resistance
• High-nickel reinforced casting for added durability
• 30% larger coolant passages for improved cooling
• Heavy-duty valve springs designed for high-boost applications

Fully Loaded & Ready to Install

Includes:

• Valve springs & retainers
• Camshaft bearings
• Valve guides & seats
• Valve stem seals
• Injector sleeves/tubes

Applications

• Caterpillar 3406E
• Caterpillar C15
• Caterpillar C15 ACERT
• 6NZ Single Turbo
• ACERT Twin Turbo Conversions

Ideal For

• Heavy-haul trucks
• Performance builds
• Large turbo setups
• Marine cam applications
• Engines from 440–680+ HP

Built for maximum durability, airflow, cooling, and combustion sealing in demanding diesel applications.

Image may be for reference only. Actual product may vary slightly but will closely match the product shown.