MAP Stage 1 Cylinder Head Preparation – 2003–2006 Mitsubishi Evo 8/9 4G63 (EVO-CHS-S1)

Description

MAP Stage 1 Cylinder Head Preparation – 2003–2006 Mitsubishi Evo 8/9 4G63 (EVO-CHS-S1)

Firstly, BUY MAP Stage 1 Cylinder Head Preparation Evo 8/9 4G63. Take your Mitsubishi Lancer Evolution 8 or Evolution 9 4G63 cylinder head to the next level with MAP Stage 1 Cylinder Head Preparation (EVO-CHS-S1). Developed by MAPerformance for the 2003–2006 Mitsubishi Evo 8/9 platform, this professional cylinder head preparation service is designed to properly clean, inspect, machine, assemble, and upgrade the cylinder head for street and performance applications.

Rather than simply replacing individual components, the MAP Stage 1 service combines professional machine work with upgraded valvetrain components to prepare the 4G63 cylinder head for installation. The service includes cleaning and hot tanking, visual inspection, high-performance deck resurfacing, MAP’s proprietary 5-angle radius valve job, final assembly, and outbound shipping.

Importantly, this Stage 1 service does not include port work. It is intended for customers who want their Evo 8/9 cylinder head properly prepared and equipped with upgraded valvetrain components without moving into a more extensive porting package. MAP also requires the customer to send in their cylinder head core for the service.

Professional 4G63 Cylinder Head Preparation

Firstly, the cylinder head is cleaned and hot-tanked before the machining and assembly process. This provides a clean foundation for inspection and subsequent preparation.

Secondly, MAP performs a visual evaluation and inspection, followed by deck resurfacing to high-performance RA specifications. Proper deck surface preparation is important for achieving reliable cylinder head gasket sealing when the head is installed on the 4G63 engine. MAP states that it uses CBN resurfacing equipment to achieve the required surface finish.

Thirdly, the service includes MAP’s proprietary 5-angle radius valve job. MAP explains that its Serdi seat and guide machine is used for valve-seat work, with the heads vacuum-checked after each seat is cut to help ensure proper valve sealing.

What’s Included

The MAP Stage 1 cylinder head preparation service includes:

• Clean / hot tank
• Visual evaluation and inspection
• Deck resurfacing to high-performance RA specifications
• MAP proprietary 5-angle radius valve job
• Final assembly
• Outbound shipping
• Kiggly springs and retainers
• Supertech valve seals
• Ferrea valves
• Mitsubishi valve locks
• MAP stud and nut kit

Key Features & Benefits

• Professional MAPerformance cylinder head preparation service
• Designed for Mitsubishi Evo 8 and Evo 9 4G63 engines
• MAP part number EVO-CHS-S1
• 2003–2006 application
• Clean and hot-tank service
• Professional cylinder head inspection
• High-performance RA deck resurfacing
• Proprietary MAP 5-angle radius valve job
• Kiggly springs and retainers
• Supertech valve seals
• Ferrea valves
• Mitsubishi valve locks
• MAP stud and nut kit
• Final cylinder head assembly
• No port work included
• Requires customer-supplied cylinder head core

Evo 8/9 4G63 Fitment

This service is specifically designed for 2003–2006 Mitsubishi Lancer Evolution 8 and Evolution 9 models equipped with the 4G63 engine. MAPerformance lists both Evo 8 and Evo 9 under the application’s fitment.

Because this is a machining and preparation service, customers must provide a suitable cylinder head core. Before shipping your cylinder head, inspect it for major damage and confirm that the core is appropriate for the service.

Stage 1 vs. Ported Cylinder Head Preparation

The MAP Stage 1 package is intended to prepare the cylinder head mechanically and upgrade its valvetrain without performing cylinder-head port work.

This makes it different from a more extensive Stage 3 preparation package, which is aimed at customers looking for additional performance-oriented cylinder head work.

If your goal is a properly prepared 4G63 cylinder head for a street-oriented or performance build, MAP Stage 1 Cylinder Head Preparation provides a comprehensive combination of machining, valve-seat work, valvetrain components, and final assembly.

If you specifically require intake or exhaust porting, this Stage 1 service is not the appropriate package because MAP explicitly states that no port work is performed.

Machine Work & Valve-Sealing Preparation

Cylinder head preparation is about much more than installing new valves and springs. The relationship between the cylinder head, valves, valve seats, and head gasket surface is critical to reliable engine operation.

MAP uses dedicated machining equipment for its valve-seat and resurfacing operations. Its published process includes vacuum checking the valve seats after cutting and setting installed valve tip height to its specifications to help maintain proper valvetrain geometry.

The deck resurfacing process is equally important. A properly prepared cylinder head surface provides the foundation for effective head-gasket sealing when the head is installed on the 4G63 block.

Installation & Service Information

This product is a professional cylinder head preparation service, so it should not be treated like a conventional bolt-on part.

The customer must send in their cylinder head core for processing. Proper packaging is important to prevent damage during transportation. Once the head has been prepared and assembled, it can be installed as part of the engine rebuild or performance project.

Professional engine assembly is recommended. Always follow the appropriate Mitsubishi 4G63 service procedures for cylinder head installation, head bolts, torque sequence, camshaft installation, valve clearance, timing components, and final engine assembly.

Package / Service Includes

• 1 × MAP Stage 1 Cylinder Head Preparation Service
• Customer-supplied Evo 8/9 4G63 cylinder head required
• Included machine work and valvetrain components listed above

Frequently Asked Questions

What is MAP Stage 1 Cylinder Head Preparation?

It is a professional cylinder head preparation service from MAPerformance for the 2003–2006 Mitsubishi Evo 8/9 4G63. It combines cleaning, inspection, deck resurfacing, a 5-angle radius valve job, upgraded valvetrain components, and final assembly.

Do I send my own cylinder head?

Yes. MAP states that this service requires the customer to send in their cylinder head core.

Does Stage 1 include porting?

No. Port work is not included in the MAP Stage 1 service.

What valves are included?

MAP lists Ferrea valves as part of the included valvetrain components.

What springs and retainers are included?

The Stage 1 package includes Kiggly springs and retainers.

Does the service include valve seals?

Yes. MAP lists Supertech valve seals among the included valvetrain components.

Is this suitable for a street Evo 8 or Evo 9?

Yes. MAP describes the Stage 1 service as an option for ensuring the cylinder head is in good working order and properly prepared for street or performance applications.

Why Buy from evomotorparts.com?

At evomotorparts.com, we specialize in Mitsubishi Evolution parts and performance components for Evo enthusiasts, engine builders, and performance workshops.

Our selection covers the major Mitsubishi Evolution platforms, including Evo 7, Evo 8, Evo 9, and Evo X, with OEM replacement parts and premium aftermarket performance components.

When building a 4G63 engine, the cylinder head is a critical part of the overall combination. Choosing professional machine work and proven valvetrain components can help create a stronger foundation for your engine rebuild or performance project.

Shop with evomotorparts.com for:

• Quality Mitsubishi Evolution performance parts
• OEM and premium aftermarket components
• Performance-focused 4G63 and 4B11T engine parts
• Competitive pricing
• Worldwide shipping
• Dedicated support for Mitsubishi Evolution enthusiasts

Conclusion

The MAP Stage 1 Cylinder Head Preparation for Evo 8/9 4G63 (EVO-CHS-S1) is a comprehensive professional preparation service for owners who want their cylinder head cleaned, inspected, machined, upgraded, and assembled for a street or performance application.

With high-performance deck resurfacing, MAP’s proprietary 5-angle radius valve job, Kiggly springs and retainers, Supertech valve seals, Ferrea valves, Mitsubishi valve locks, and MAP hardware, the service provides a strong foundation for a properly built Evo 8 or Evo 9 4G63 cylinder head.

Buy MAP Stage 1 Cylinder Head Preparation for Evo 8/9 from evomotorparts.com when you’re ready to properly prepare your 4G63 cylinder head for your next engine build.

BUY MAP Stage 1 Cylinder Head Preparation Evo 8/9 4G63, Professional head machining with 5-angle valve work, Kiggly springs, Ferrea valves and seals.